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 + 2a = 9a - z + 1 for a in terms of z.
| \(\frac{3}{16}\)z - \(\frac{1}{16}\) | |
| -1\(\frac{1}{5}\)z + 1\(\frac{2}{5}\) | |
| -2\(\frac{1}{2}\)z + 1\(\frac{1}{2}\) | |
| -\(\frac{4}{9}\)z - \(\frac{5}{9}\) |