Solve using elimination method 8x - 9y = 8.5 7y - 2x = -4.5

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Solve using elimination method 8x - 9y = 8.5 7y - 2x = -4.5

Mathematics
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okay, 8x - 9y = 8.5 ----------------->equation A 7y - 2x = -4.5 ------------------>equation B equation B can be written as -2x + 7y = -4.5
now, in order to do elimination of variables, you have to find the least common multiple for coefficients in both equations one of the variables, say x
multiply eq. 1 by 7 and eq. 2 by 8 and then subtract both of them you will get an eq. in terms of y.........solve it

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the LCM of 8 and 2 is 8, so multiply equation B by 4 to get -8x + 28y = -18
add the new equation to equation A to get rid of the variable x (or eliminate it) . then you will have the equation in terms of y. Solve that equation. find out the value of y and substitute in one of the equations to get the value of x
she just wants answers.
ya i figured that. I am not going to do her problems for her. I can only show her how to do the problem

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