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