Solve the inequality 31< 3x+4

The solution of the given inequality  x>9

Step-by-step explanation:

Explanation:-

Given that the inequality      31 < 3 x + 4

                      Subtracting '4' on both sides, we get

                                    31 - 4 < 3 x + 4 -4

                        ⇒         2 7  <  3 x

                      Dividing '3' on both sides, we get

                        ⇒         9 < x

                                   x > 9

what?

step-by-step explanation:

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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