Question 637824


{{{A+B=180}}}.........1

{{{ A=(10x+7)}}}........2

{{{B=(7x+3)}}}....3

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{{{A+B=180}}}...plug 2 and 3 in 1 and solve for {{{x}}}

{{{(10x+7)+(7x+3)=180}}}

{{{10x+7+7x+3=180}}}

{{{17x+10=180}}}

{{{17x=180-10}}}

{{{17x=170}}}

{{{x=170/17}}}

{{{x=10}}}.........now find {{{A}}} and {{{B}}}


{{{ A=(10x+7)}}}........2..plug in {{{x}}}

{{{ A=10*10+7}}}

{{{ highlight(A=107)}}}

{{{B=(7x+3)}}}....3..plug in {{{x}}}

{{{B=7*10+3}}}

{{{highlight(B=73)}}}

check:

{{{A+B=180}}}.........1

{{{107+73=180}}}

{{{180=180}}}