Question 698463
Equation 1: {{{A + 7 = B}}}
Equation 2: {{{2B - 26 = 3A}}}
Plug (A + 7) into equation 2 for B
Equation 2: {{{2B - 26 = 3A}}}
{{{2*(A + 7) - 26 = 3A}}}
Simplify
{{{2A + 14 - 26 = 3A}}}
Combine like terms
{{{2A -12 = 3A}}}
Subtract 2A from both sides
{{{highlight(-12 = A)}}}
Plug -12 into equation 1 for A
Equation 1: {{{A + 7 = B}}}
{{{(-12) + 7 = B}}}
{{{highlight_green(-5 = B)}}}