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 5a + 3a = 6a + 8z - 4 for a in terms of z.
| -5z + 4 | |
| 1\(\frac{1}{2}\)z - 1\(\frac{3}{4}\) | |
| \(\frac{5}{7}\)z - \(\frac{2}{7}\) | |
| -1\(\frac{1}{2}\)z + \(\frac{5}{6}\) |