Question

Solve the following simultaneous equations.
(a) 3x + 2y = 23 ; x + 2y = 9​

Answer 1

Answer:

see answer

Step-by-step explanation:

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Answer 2

Answer:

Step-by-step explanation:

3x + 2y = 23 _{1}

x + 2y = 9_{2}

multiplying the equation number [2} with 3 both sides​

3x+6y=27_{3}

subtracting  equation {1}-{3}

3x+2y-3x-6y=23-27

-4y= -4

y=1_{4}

substituting equation number {4} in  {2}

x + 2(1)=9

x=9-2

x=7

therefore, (x,y)=(7,1)