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 2a - 9a = -5a + 5z - 2 for a in terms of z.
| -2\(\frac{1}{7}\)z + \(\frac{2}{7}\) | |
| \(\frac{13}{15}\)z + \(\frac{2}{15}\) | |
| -2\(\frac{1}{5}\)z + 1\(\frac{2}{5}\) | |
| 2z - \(\frac{2}{7}\) |