7. solve the equation 0.25(x + 4) - 3 = 28.

Explanation:

Step1: Add 3 to both sides

$0.25(x + 4)-3+3=28 + 3$ $0.25(x + 4)=31$

Step2: Divide both sides by 0.25

$\frac{0.25(x + 4)}{0.25}=\frac{31}{0.25}$ $x + 4 = 124$

Step3: Subtract 4 from both sides

$x+4 - 4=124 - 4$ $x = 120$

Answer:

$x = 120$