Please help it’s a test

x=7

Step-by-step explanation:

3(2x+6)=60

2x+6=20

x+3=10

x=7

x =7

Step-by-step explanation:

60/3 =20

20 = 2x +6

14 = 2x

14/2 = x

7 =x

x = 7

CHeck Back

2 x 7 + 6 = 20

20 x 3 = 60

b

step-by-step explanation:

according to the triangle sum theorem, all the angles in a triangle must add up to 180 degrees. if we know one angle is already 90, we do 180-90=90. the other 2 angles must add up to 90, exactly.

step-by-step explanation: