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 -7a + 2a = 8a - 9z - 8 for a in terms of z.
| -\(\frac{3}{8}\)z + \(\frac{5}{8}\) | |
| 2z + 3 | |
| \(\frac{11}{15}\)z + \(\frac{8}{15}\) | |
| \(\frac{1}{2}\)z + \(\frac{1}{2}\) |