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 -9a + 6a = 7a - z + 4 for a in terms of z.
| -\(\frac{5}{8}\)z - \(\frac{1}{2}\) | |
| -5z + 1 | |
| -z + \(\frac{1}{5}\) | |
| \(\frac{7}{16}\)z - \(\frac{1}{4}\) |