Question

3x+3y=8. by 4x+6y=7 elimination method

Answer 1

(3x+3y=8)*4=>12x+12y=32
(4x+6y=7)*3=>12x+18y=21

=>12x+12y=32
(-)12x(-)18y=(-)21
=>0-6y=11
-6y=11
=>y= -11/6

3x+3(-11/6)=8
3x-11/2=8
=>6x-11=16
6x=16+11
6x=27
x=27/6
=>x= 9/2

Answer 2

2(3x+3y=8)
6x+6y=16

6x+6y=16
4x+6y=7
- - -
2x=9
x=9/2