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