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