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 + 5z - 3 for a in terms of z.
| 8z + 8 | |
| -3z + 1\(\frac{2}{3}\) | |
| -\(\frac{3}{13}\)z + \(\frac{3}{13}\) | |
| -3\(\frac{2}{3}\)z - \(\frac{1}{3}\) |