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