solve 9x - 8y=7 and 2x -3y =8 by eliminating method
Answers
We have 2 equations over here..So take the first equation,
9x-8y=7
and the second one,
2x-3y=8
First choose which term u want to eliminate...Let's say I want to eliminate the X term. Then multiply equation 1 with the coefficient of X in equation 2.
And multiply equation 2 with the coefficient of X in equation 1.(I know this is a bit confusing...But it's actually very easy)
Therefore we have our new equations
18x-16y=14
-18x+27y=-72(the signs will change accordingly)
Eliminate the X term then we have
11y=-58
y=-58/11
Substitute y value in any of the equation and get the answer.
Substitute y value in equation 2
2x-3*-58/11=8
2x+174/11=8
2x*11+174/11=8(taking LCM)
22x+174=88
22x=88-174
22x=-86
x=-86/22
x=-43/11
Answer:
Explanation:
9x - 8y = 7 -------------------------eq:1 *2
& 2x - 3y = 8------------------------eq:2 *9
now, 18x - 16y = 14
-(18x - 27y = 72)
0x + 11y = -58
y=-58/11
now put this value in eq:1
and u will have ur answer