solve 1. 2x+7y=17 and 5x+3y=-1 and 2. 5x+3y=23 and 2x+4y=15 by elimination method
rimzrazzaq38:
did you mean find the value of x and y
yes
if you have any problem in this answer you can ask
you did not solve the second question
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the answer of 1. is y=3 and X=-2
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1. 2x + 7y =17 equation no 1
5x +3y = -1 equation no 2
multiply equation no 1 by 5
5(2x) + 5(7y) = 5(17)
10x +35y = 85 equation no 3
multiply equation no 2 by 2
2(5x) + 2(3y) = 2(-1)
10x +6y =-2 equation no 4
Subtract equation no 4 from equation no 3
10x + 35y = 85
- 10x - 6y = +2
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0 + 29y = 87
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29y = 87
y= 87 /29
y= 3 answer
put the value of y =3 in equation no 1
2x + 7y = 17
2x + 7(3) = 17
2x + 21 = 17
2x = 17-21
2x = -4
x = -4/2
x = -2 answer
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