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 + 9a = 8a + 4z - 6 for a in terms of z.
| 1\(\frac{7}{10}\)z - \(\frac{9}{10}\) | |
| -1\(\frac{5}{7}\)z + \(\frac{6}{7}\) | |
| \(\frac{5}{9}\)z + \(\frac{2}{3}\) | |
| -\(\frac{7}{11}\)z - \(\frac{7}{11}\) |