Can someone help me please

x=17°

Step-by-step explanation:

The opposite angles, will always be the same. so the the angle across from 163° will be 163

so 163°-x°=180°

Because straight angles = 180°

You'd get x°=17°

Hope this helps :))

2nd one in the first row is correct

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