Question

if 4x + 3y = 10 , 3x + 4y = -3 then find the value of x+y
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Answer 1

Answer:

X = 7 ; Y = -6

Step-by-step explanation:

4x + 3y = 10 ----1

3x + 4y = -3 ----2

eqn 1 + 2

4x + 3y = 10

3x + 4y = -3

=7x + 7y = 7

divide by 7

x + y = 1 ---- 3

eqn 1 - 2

4x + 3y = 10

3x + 4y = -3

- - +

= x - y = 13 --- 4

eqn 3 + 4

2x = 14

x = 7

put in eqn 3

7 + y = 1

y = 1 -7

y = -6

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