Solve the system of equations by the substitution method

Algebra
Tutor: None Selected Time limit: 1 Day

-x+2y=5

-4x+7y=19

Jul 23rd, 2015

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-x + 2y = 5

x= 2y -5

Substituting in equation no 2

-4 (2y-5) +7y =19

-8y +20 +7y = 19

-y=-1

y =1

Hence, x = 2(1) -5 = -3



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Jul 23rd, 2015

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