-3x + 8 = 12
answer this problem

7(x - 2) = 3(x + 4) solve the following equation. then enter your answer in the space provided using mixed number format.

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of