Question

Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this.
10x + 11y = -26.5

20x + 5y = -27.5

Answer 1

(10x + 11y = -26.5)mult by 2 20x+22y=-53
20x + 5y = -27.5 - (20x + 5y = -27.5)
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0+17y= -25.5
y=-25.5/17
y=-3/2 ans.. sub this
to either of the eq or to
20x + 5y = -27.5
20x + 5(-3/2) = -27.5
20x - 15/2 = -27.5
20x=-20
x=-20/20
x=-1 ans

(x,y)=(-1,-3/2) ,.....ans...

Answer 2

thank you

Answer 3

yw..good luck now