Solve the pair of linear equations in two variables by graph :
2x+y = 8, x+6y = 15
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Answer:2x+y=8. equation 1
x+6y=15 equation 2
Multiply equation ( 2) by 2
2x+12y=30. Equation 3
Subtracting equation (1) and(3)
2x+y=8
2x+12y=30
(-) (-). (-)
-11y =-22
y=22÷11
y=2
Subst y=2 in equation (1)
2x+y=8
2x+2=8
Now +2 will go there and become -2
2x=8-2
2x=6
x=6÷2
x=3
Step-by-step explanation:
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