9x+3x-10=3(3x+x)? Identity or no solution show steps

no solution

Step-by-step explanation:

9x+3x-10=3(3x+x)

Distribute

9x+3x-10=9x+3x

Combine like terms

12x-10 = 12x

Subtract 12x from each side

12x-10-12x = 12x-12x

-10 =0

This is never true so there are no solutions

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

where's the diagram?

step-by-step explanation: