Question

What is 3x + 4y = 18
x + 3y = 11

Can you show me the process of how you got the answer. I'm only in 8th grade.

Answer 1

(2, 3)

Answer 2

\[x=11-3y => 3(11-3y) + 4y = 11 => 33-9y+4y = 11\]
\[-9y+4y=11-33 => -5y= -22 => y = -22/-5 = 4.4\]

Answer 3

Isolate y and do the same as I did to find its value.

Answer 4

3x + 4y = 18
Multiply the second equa. for 3:
3x + 9y = 33
Subtract:
5y = 15 => y = 3
Replace:
x = 11 - 3y = 11 - 3 * 3 = 2
Thus intersection point (2, 3)

Answer 5

Wow, what a big mistake I made...

Answer 6

Turned 3 into 33..