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OpenStudy (katielong):
have i done this right? solve this simultaneous equation: 4x+y=1 2x-3y=18 4x-6y=36 4x+y=1 (-) -7y=35 -y=5 y=-5 thanks =)
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OpenStudy (anonymous):
what about x? y is correct
OpenStudy (katielong):
1.5?
OpenStudy (anonymous):
yes
OpenStudy (anonymous):
4x+y =1 --> y = 1 - 4x 2x-3y=18 => 2x -3 (1 -4x) = 18 2x - 3 + 12x = 18 14x = 21 ->x = 21/14 = 3/2 => y = 1 - (4 * 3/2) = 1 - 6 = -5 (3/2 , -5)
OpenStudy (katielong):
i perfer my way...
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