Answer:
z = -3
Step-by-step explanation:
There are four terms here. Multiply each by 4 to remove the fractional coefficient 1/4:
z + 3z + 28 = -4z + 4
Combining the z terms, all on the left sides, we get 8z + 28 = 4, which simplifies to 8z = -24. Then, dividing both sides by 8, we get z = -3 (answer)
Note:
We are using the Distributive Property of Multiplication here:
4(1/4)(z + 3z) + 4(7) = 4(-z + 1)
