4x + 2y = 30
Substitute for the variables
y could be equal to 3
x could be equal to 6
So that means that,
4 x (6) + 2 x (3)= 30
24 + 2 x (3)= 30
24 + 6= 30
30 = 30
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2x+y=-12-4x-2y=30 x=-y/2+30, you plug this into -12-4x-2y=30 and get -12+2y-120-2y=30 which gives 2y-2y=162. This is not possible, so the equation is unsolvable.
4x+2y = 20 2y = -4x+20 y = -2x+10
8x+2y=4x=-y/4+0.5y=-4x+2
4x + 2(3x) = 30 10x = 30 x= 3. Y= 9. (3,9)
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