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Answer:
Multiplying the first equation by 1 and the second equation by 5 to eliminate the y variable .
x= 0.3
y= -1.9
Step-by-step explanation:
8.3x + 5y = -7 ----------i
- 7x + y = -4 -----------ii
Multiply the first equation by 1 and the second equation by 5 to eliminate the y variable as below;
[8.3x + 5y = -7 ]1
[- 7x + y = -4]5
8.3x + 5y = -7
-35 x + 5y = -20
perform subtraction to eliminate y as
8.3x --35x = -7--20
43.3 x = 13
x= 13/43.3
x= 0.3
Using equation ii ;
-7x + y = -4
-7 * 13/43.3 + y = -4
-91/43.3 + y = -4
y= -4 + 91/43.3
y= -4 + 2.1
y= -1.9