What is the answer for this

4. x = 23 degrees

5. m<A = 33 degrees

m<B = 66 degrees

m<C = 82 degrees

Step-by-step explanation:

4.

(2x + 21) + 90 degrees + x = 180 degrees

(2x + 21) + x = 90 degrees

3x + 21 = 90

3x = 69

x = 23 degrees

5.

2x + x + (2x + 15) = 180 degrees

5x + 15 = 180

5x = 165

x = 33

37/3

step-by-step explanation:

step 1: simplify both sides of the equation.

7x+8(x+

1

4

)=3(6x−9)−8

7x+(8)(x)+(8)(

1

4

)=(3)(6x)+(3)(−9)+−8(distribute)

7x+8x+2=18x+−27+−8

(7x+8x)+(2)=(18x)+(−27+−8)(combine like terms)

15x+2=18x+−35

15x+2=18x−35

tep 2: subtract 18x from both sides.

15x+2−18x=18x−35−18x

−3x+2=−35

step 3: subtract 2 from both sides.

−3x+2−2=−35−2

−3x=−37

step 4: divide both sides by -3.

−3x

−3

=

−37

−3

x=

37

3