Solve for x. Round to the nearest tenth.

18.5

Step-by-step explanation:

tan 51 = x /15

x = 15 tan 51

x = 15 x 1.235

x 18.525

x = 18.5

Step-by-step explanation:

tan 51° = x/15

x = 15 tan 51°

x = 18.5

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