Question

Find the solution by substitution method: x+2y=5 and 3x + 7y=17​

Answer 1

multiply first eqn by 3

we get

3x+6y=15...../3/

subtract eqn3 from2

3x+7y=17

-3x+6y=15

y=2

x get cancel

put y =2 in 1 eqn

x+2*2=5

x+4=5

x=5-4

x=1

x=1,y=2

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