SOLUTION: Can i need ur help for this problem....thank you for the help.....😊 4x+7y=-2 6x-8y=5 Using linear equition substitution and illimination
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Question 1089533
:
Can i need ur help for this problem....thank you for the help.....😊
4x+7y=-2
6x-8y=5
Using linear equition substitution and illimination
Answer by
rothauserc(4718)
(
Show Source
):
You can
put this solution on YOUR website!
1)4x+7y = -2
2) 6x-8y = 5
:
solve equation 2 for x
:
6x = 8y+5
x = (8y+5)/6
:
substitute for x in equation 1
:
4[(8y+5)/6] +7y = -2
:
(32y+20)/6 +7y = -2
:
multiply both sides of = by 6
:
32y+20 +42y = -12
:
74y = -32
:
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y = -32/74 = -16/37 approx −0.4324
x = [8(-16/37)+5]/6 approx 0.2568
:
check answer
:
1) 4*(0.2568) +7*(-0.4324) = -2
-1.9999 approx -2
:
2) 6*(0.2568) -8*(-0.4324) = 5
5.0002 approx 5
:
our answer checks
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