Question

Solve the simultaneous equations 5 x + y = − 5 5 x − 2 y = − 20

Answer 1

Answer:

x= -1 and y = 0

Step-by-step explanation:

5x+y= -5.......... (i)

5x-2y= -20...... (ii)

Multiplying eq(i) by 2

10x+2y= -10.......... (iii)

Adding eq (ii) and (iii) we get,

10x+2y= -10

5x-2y= -20

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15x = -30

x = -30

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15

x= -1

Substituting x= -1 in eq (iii)

10x+2y=-10

10(-1)+2y=-10

-10+2y = -10

2y = -10+10

2y = 0

y = 0 / 2

y = 0