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 + 6a = 6a + 7z - 7 for a in terms of z.
| -1\(\frac{1}{5}\)z - 1\(\frac{1}{5}\) | |
| -\(\frac{3}{4}\)z - \(\frac{1}{3}\) | |
| -\(\frac{1}{5}\)z + 1\(\frac{2}{5}\) | |
| \(\frac{5}{8}\)z + \(\frac{1}{16}\) |