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 + 3a = 6a - 2z - 7 for a in terms of z.
| \(\frac{5}{11}\)z + \(\frac{7}{11}\) | |
| -\(\frac{5}{9}\)z + \(\frac{7}{9}\) | |
| z + 1\(\frac{2}{5}\) | |
| \(\frac{4}{5}\)z + \(\frac{2}{5}\) |