Solve equation by using the elimination method

Mathematics

1 answer:

VladimirAG [237]3 years ago

8 0

Re-write
8x + 14y = 4 (1)
-6x - 7y = -10 (2)

multiply (1) by 3 and (2) by 4
now you have
24x + 42y = 12
-24x - 28y = -40
-------------------------add
14y = -28
y = -2

8x + 14y = 4
8x + 14(-2) = 4
8x - 28 = 4
8x = 32
x = 4

answer
x = 4 and y= -2

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