When solving an equation with two variables, replace the variables with the values given and then solve the now variable-free equation. (Remember order of operations, PEMDAS, Parentheses, Exponents, Multiplication/Division, Addition/Subtraction.)
Solve 8a - 2a = -5a + 8z - 7 for a in terms of z.
| -1\(\frac{1}{2}\)z - 1\(\frac{3}{4}\) | |
| \(\frac{10}{13}\)z - \(\frac{7}{13}\) | |
| -7z - 9 | |
| -3\(\frac{1}{2}\)z - 4\(\frac{1}{2}\) |