what -4x-15=5y , 8x+4y=3 using substaution

What s 4X+2y=-5 , 8x+4Y=3
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1 Answer

line 1...5y=-4x-15 become y=-0.8x-3

line 2...8x+4y=3 become 8x+4*(-0.8x-3)=3,

or 8x-3.2x-12=3

or 4.8x=12+3=15, so x=15/4.8

x=3.125

y=-0.8*x-3...=-2.5-3....

y=-5.5
by

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