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 2a + 9a = 7a - 8z - 7 for a in terms of z.
| -\(\frac{8}{13}\)z + \(\frac{9}{13}\) | |
| 11z + 4 | |
| -2z - \(\frac{2}{3}\) | |
| 3\(\frac{2}{5}\)z + 1\(\frac{2}{5}\) |