Explanation:
Step1
Make y the subject of the formula from equation 2
-15y/-15=-15-15x/-15
Y=15+15/15..............3
Substitute equ..... 3 to equ.... 1
5x-5(15+15/15)=1
5x-1(15+15/3)=1
3*5x-1*3(15+15/3)=1*3
15x-1(15+15)=3
15x-15-15pp=3
15x-30=3
15x=3+30
15x/15=33/15
x=2.2
From equation.....
5x-5y=1
5(2.2)-5y=1
11-5y=1
-5y=1-11
-5y/-5=10/-5
Y=-2
PROVE
FROM EQUATION ONE
5X-5Y=1
5(2.2)-5(-2)=1
11-10=1
1=1
SO Y=-2 AND X=2.2