5272道题目5525 条题源记录 · 相同内容已合并
一元一次方程与代数求值进阶
What value of p is the solution to the equation \( 4p-5p=7 \)?
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一元一次方程与代数求值进阶
\( y-39=px \)
The given equation relates the positive numbers p , x , and y . Which equation correctly expresses y in terms of p and x ?
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一元一次方程与代数求值挑战
\( 0.10x+0.20y=0.19(x+y) \)
The equation gives a volume x, in gallons, of a 10% saltwater solution that could be mixed with a volume y, in gallons, of a 20% saltwater solution to produce a 19% saltwater solution. According to this equation, what volume, in gallons, of the 20% saltwater solution could be mixed with 80.0 gallons of the 10% saltwater solution to produce a 19% saltwater solution? (Assume that the volume of the mixture is the sum of the volumes of the two solutions before they were mixed.)
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一元一次方程与代数求值挑战
If \( \frac{3x}{2}-12=\frac{21}{2}-12 \) , what is the value of \( 3x \)?
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一元一次方程与代数求值进阶
A geologist is analyzing a sample of a coarse-grained igneous rock. The equation \( 3.00x+4.00y=98.0 \) gives the relationship between the estimated volumes of mineral X and mineral Y found in the sample, where x is the estimated volume, in cubic centimeters cm³, of mineral X and y is the estimated volume, in cm³, of mineral Y. If the estimated volume of mineral Y in the sample is 12.8 cm³, what is the estimated volume, in cm³, of mineral X in the sample?
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一元一次方程与代数求值进阶
If \( \frac{1-x}{5}-81=\frac{7\left(1-x\right)}{8} \), what is the value of \( 2−2x \)?
原库参考解析
一元一次方程与代数求值挑战
\( \frac{x-8}{8}+7=\frac{x+7}{3} \)
The solution to the given equation is between which of the following pairs of values?
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一元一次方程与代数求值进阶
\( x+75=175 \)
What value of x is the solution to the given equation?
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一元一次方程与代数求值进阶
If \( 5x+4=34 \), what is the value of \( 50x+40 \)?
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一元一次方程与代数求值进阶
If \( 15x=13x+10 \), what is the value of \( 7x \)?
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一元一次方程与代数求值进阶
\( 5x+12=2(8+6x) \)
Which of the following is equivalent to the given equation?
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一元一次方程与代数求值进阶
\( x=\frac{w-23y+z}{46wy} \)
The given equation relates the variables w, x, y and z where the values of w, x, and z are distinct and positive. Which expression is equivalent to y?
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