3x + y = 9, y = 2x + 4
Solve by substitution!
Just explain how to get y!! please ty

The given equations are :

3x + y = 9 - [1]y = 2x + 4 -[2]

Plug the value of y from equation [2] into equation [1]

3x + y = 93x + 2x + 4 = 95x = 9 - 4x = 5 ÷ 5x = 1

Now, plug value of x in equation [2]

y = 2x + 4 y = (2 × 1) + 4y = 2 + 4 y = 6

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Answer: the correct answer is 10step-by-step explanation: let the number be n, then the expression becomes,then“twelve more than the quotient of a number and two, decreased by four” iswhen n=4,we substitute 4 whetever we see n to get,we simplify to obtain,we further simplify to get,therefore the correct answer is c.

I’m pretty sure the answer is a