sat suite question viewer
Algebra
/ Linear equations in two variables
Difficulty: Medium
A chemist combines water and acetic acid to make a mixture with a volume of . The volume of acetic acid in the mixture is . What is the volume of water, in , in the mixture? (Assume that the volume of the mixture is the sum of the volumes of water and acetic acid before they were mixed.)
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Explanation
The correct answer is . It's given that a chemist combines water and acetic acid to make a mixture with a volume of milliliters (mL) and that the volume of acetic acid in the mixture is mL. Let represent the volume of water, in mL, in the mixture. The equation represents this situation. Subtracting from both sides of this equation yields . Therefore, the volume of water, in mL, in the mixture is .