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 -a + 7a = -3a + 2z + 6 for a in terms of z.
| 6z + 4 | |
| \(\frac{2}{13}\)z + \(\frac{2}{13}\) | |
| -2\(\frac{1}{2}\)z + 3 | |
| \(\frac{1}{2}\)z + \(\frac{1}{2}\) |