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 - 3a = 4a + 8z - 8 for a in terms of z.
| -1\(\frac{7}{9}\)z - \(\frac{5}{9}\) | |
| -z + \(\frac{8}{11}\) | |
| -\(\frac{9}{13}\)z - \(\frac{1}{13}\) | |
| -1\(\frac{6}{7}\)z + \(\frac{5}{7}\) |