Question

Solve the following pair of linear equation by the elimination method and the substitution method. 1. X + y = 5 and 2x - 3y = 4
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Answer 1

Step-by-step explanation:

3(x+y=5)

3x+3y=15

2x-3y=4

5x=19

x=19/5

y=6/5

Answer 2

Answer:

9

Step-by-step explanation:

x+y=5

=> x= 5-y

putting the value of 'x' in 2x-3y = 4

=> 2(5-y) -3y = 4

=> 10- 2y -3y = 4

=> 10 -5y = 4

=> -5y = 4-10 = -6

=> y = -6/-5 = 1.2

therefore, x=5-y= 5-1.2 = 3.8