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2 answers

3x - 2y = 7 multiply both sides by 2
6x -4y = 14
6x - 7y = 2 subtract this one from the one above
0x + 3y = 12
3y = 12
y = 4

substitute: 3x - 2(4) =7
3x - 8 =7
3x = 15
x = 5

2007-03-13 02:26:42 · answer #1 · answered by Goddess of Grammar 7 · 0 0

Sorry approximately your math instructor! So what you do on the 1st one is....you're the two utilising removal or substitution i'm guessing by way of the concern. for this reason you have 2 variables that are ones so substitution may well be less complicated. So on the 1st (or 2nd. despite you opt for) positioned y on one edge of the = sign and the different stuff on the different edge. So ... y= -3x +sixteen. I merely moved the 3x over. then you certainly substitute -3x+sixteen into the different equation for y. 2x + (-3x+sixteen) = 11. Now remedy commonly. So... (2x + -3x is -x by way of ways) -x +sixteen = 11. Subtract and you get -x= -5. replace that to x=5. it rather is the comparable ingredient. Now all you opt for is the y. So plug the 5 into one in all the two equations and remedy back. i will apply the 2nd. 2(5) + y = 11. So y= a million. good success and that i wish I helped!

2016-10-02 01:16:37 · answer #2 · answered by ? 4 · 0 0

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