7x-10y=2 x+2y=3 by using elimnation method
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3x - 10y = 11
7x - 2y = -17
Multiply bottom equation by -5 so that the Y value cancels out.
3x - 10y = 11
-35x + 10y = 85
-32x = 96
x = - (96/32)
x = -3
Substitute x back into one of the equations
3(-3) - 10y = 11
-9 -10y = 11
-10y = 20
y = - (20/10)
y = -2
Therefore x=-3 and y=-2
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Answered by
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Answer:
Question is 7x-10y =2
x+2y = 3
solution : By elimination method
Multiply equation (ii) by 7,
so we get
7x-10y= 2. (subtract eq. i from ii )
7x+14y=21
- - - (sign changed)
_________
-24y = -19
__________
y=19/24
putiing the value of y in eq. ii
x+2×19/24= 3
x+38/24=3
24x+38/24=3
24x+38=72
24x=72-38 =34
x=34/24
x=17/ 12. is the final answer
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