Determine the simplified expression of the given equation:
$6(x+7)+(x+3)$
\( \boxed{7x+45} \)
Step 1 :Distribute the 6 to both terms inside the first set of parentheses: \( 6(x+7) = 6x + 42 \)
Step 2 :Combine like terms: \( 6x + 42 + (x+3) = 7x + 45 \)
Step 3 :\( \boxed{7x+45} \)