Question 300810
Set-Up:
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Equation 1: {{{A = 3 + 2B}}}
Equation 2: {{{A + B = 36}}}
Soulution:
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Plug (3 + 2B) into equation 2 for A
Equation 2: {{{A + B = 36}}}
{{{(3 + 2B) + B = 36}}} Simplify
{{{3 + 3B = 36}}} Subtract 3 from both sides
{{{3B = 33}}} Divide both sides by 3
{{{highlight_green(B = 11)}}}
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Now plug 11 into equation 1 for B
Equation 1: {{{A = 3 + 2B}}}
{{{A = 3 + 2*(11)}}} Simplify
{{{A = 3 + 22}}} Simplify
{{{highlight(A = 25)}}}