solve the following pair of equation by substitution method:. 7x-15y=2. x+2y=3​

Question

solve the following pair of equation by substitution method:. 7x-15y=2. x+2y=3​

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Savannah 3 days 2021-09-09T06:08:37+00:00 2 Answers 0 views 0

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    0
    2021-09-09T06:10:30+00:00

    Step-by-step explanation:

    7x=2+15y

    x=2+15y/7

    put value of x in second equation

    0
    2021-09-09T06:10:36+00:00

    Answer:

    7x-15=2…..1st term

    x+2y=3…..2nd term

    multiply 1st term with 1 and 2nd term with 7

    7x-15y=2

    7x+14y=21

    sign change will be there second term 7x is of + it will change into minus and 14y is of + it will change into minus 21 is also of + it will change into minus ……then

    7x ( they both will be cancelled) -15y=2

    -7x +14y=-21

    ________

    -y= -19

    y= 19

    put y=19 in 2nd term x+2y=3

    x+2*19=3

    x+38=3

    x=3-38

    x= -35

    so ur answer is x =35 and y = 19........

    hope it helps...

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