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 -7a + 2a = 9a - 8z - 2 for a in terms of z.
| \(\frac{5}{8}\)z + \(\frac{1}{8}\) | |
| 1\(\frac{4}{5}\)z + 1\(\frac{3}{5}\) | |
| \(\frac{2}{3}\)z - 3 | |
| 2z - \(\frac{2}{5}\) |