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To solve the equation \( 7(x + 3) = 28 \), follow these steps:
1. Divide both sides of the equation by 7:
\[
x + 3 = \frac{28}{7}
\]
\[
x + 3 = 4
\]
2. Subtract 3 from both sides:
\[
x = 4 - 3
\]
\[
x = 1
\]
So, the solution is \( x = 1 \).