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 - 7a = 5a + 9z + 7 for a in terms of z.
| \(\frac{1}{9}\)z - \(\frac{5}{9}\) | |
| z + \(\frac{9}{11}\) | |
| -1\(\frac{3}{13}\)z - \(\frac{7}{13}\) | |
| 4z - 5 |