1 answer:
Answer:
x=4
y=-3
Step-by-step explanation:
use substitution method :
1)
7x + 8y = 4 ... (1)
3x + 2y = 6 ... (2)
2) Create the third equation by using
equation (2)
3x + 2y = 6
3x = 6-2y
x = 6-2y/3 ..... (3)
3) Substitute (3) into (1)
7(6-2y)/3 + 8y = 4
4) Solve the equation
42 - 14y /3 + 8y = 4
42 -14y+24y = 12
10y = 12-42
y = -3
5) Find value of x
x = 6-2y/3
= 6 -2(-3)/3
= 12/3
= 4
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