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 6a - 7a = 2a - 4z + 4 for a in terms of z.
| -\(\frac{2}{7}\)z + 1\(\frac{1}{7}\) | |
| -\(\frac{6}{11}\)z - \(\frac{1}{11}\) | |
| \(\frac{3}{4}\)z + 1 | |
| 3z + 9 |