Find x and y by elimination
method
X/2-y/9=6,
X/7+y/3=5
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Answer:
x = 10
x = 10y = 9
Step-by-step explanation:
x/2 - y/9 = 6 -------- 1
x/7 + y/3 = 5 ------- 2
By taking LCM, solving 1 st equation
9x - 2y/18 = 6
9x-2y = 108 -------3.
By taking LCM, solving 2nd equation
3x + 7y/21 = 5
3x + 7y = 105 ------- 4
now solve equation. 3 and 4 by elimination method
9x - 2y = 108
(-) (-) (-)
9x + 21y = 315 { 3x +7y = 105 (×3)}
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-23y = -207
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y = 9
sub y = 9 in equation 3
9x - 2(9) = 108
9x -18 = 108
9x = 108+18
9x = 126
x = 14
Therefore by solving x = 10, Y = 9
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