Question

Solve the following simultaneous equation, using substitution method:
3x + 5y= 10
x - 2y = 7

Answer 1

Answer:

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Answer 2

Step-by-step explanation:

3x+5y=10 ........(i)

x-2y=7...........( ii)

eqn(i)×1=3x+5y=10

eqn(ii)×3=3x-6y=21

(-) (+) =(-)

——————————

subtract=> 11y= -11

=> y= -1

put the value of y= -1 in the (ii) eqn

x-2y=7

=>x-2(-1)=7

=>x+2=7

=>x= 7-2 =5

x=5

y= -1