Question

solve the system of equations by substitution. check your answer 1) 2x-y=23. 2) 6x-9=yx-9=-1 y=-3x

Answer 1

2) x = 3 and y = 9

Step-by-step explanation:

2) Given the simultaneos equation;

6x - 9 = y .... 1

y = 3x ... 2

Substitute equation 2 into 1 as shown;

6x - 9 = 3x

Collect the like terms

6x - 3x = 0+9

3x = 9

Divide both sides by 3

3x/3 = 9/3

x = 3

Recall that y = 3x

y = 3(3)

y = 9

Hence the solution to the system of equation is (3, 9)