Question

Solve by the elimination method
0.05x+0.25y=66
0.15x=0.05y=72

Answer 1

which = sign is a + ?

Answer 2

it must b -

Answer 3

x = 532.5

y = 157.5

Answer 4

oops I apologize its 0.15x+0.05y=72

Answer 5

:o

Answer 6

x = 420

y= 180

Answer 7

0.05x +0.25y = 66 ; multiply this by -3
0.15x +0.05y = 72


-.15x -0.75y = -198
0.15x +0.05y = 72 ; now add them together
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-.7 = -126 ; divide out the -.7 to get

y = -126/-.7 = 180

Answer 8

when you know what y equals, we can just plug it into one of the original equations and solve for x