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 - 9a = -6a + 7z + 1 for a in terms of z.
| 2z + 1\(\frac{1}{2}\) | |
| 4z - 7 | |
| 16z + 1 | |
| z - \(\frac{7}{13}\) |