480,081 views
38 votes
38 votes
Could you please check my answer? Use elimnation to solve the system of equations:3x+4y=82x+3y=8My answer: (-8, 8)

User KepPM
by
2.7k points

1 Answer

21 votes
21 votes

According to the given data we have the following system of equations:

3x+4y=8

2x+3y=8

In order to calculate the variables x and y we would make the following calculations:

3x+4y=8

2x+3y=8

First we would multiply 3x+4y=8 times 2 and 2x+3y=8 times -3 So:

3x+4y=8

2x+3y=8

0 -y=-8

y=8

If y=8, hence, we would substitute the value of y into the first equation so we can finally calculate the variable x.

So:

plug y=8 into 3x+4y=8

3x + 4(8)=8

3x+ 32=8

3x=-24

x=-24/3

x=-8

Hence, the values of x and y would be (-8,8)

User Onepiece
by
2.8k points