Question

PLEASE ANSWER THESE QUESTIONS.

Answer 1

Answer:

7. 9 +3x= 45

3x = 45-9

3x = 36

x = 36/3

x = 12

verification :

thus thrice a number 12 meaning 3×12 =36

n add 9 to 36 = 45

8. 3(x+1)=69

3x +3 =69

3x = 69 -3

x = 66/3

x =22

verification ,

3 (22+3) = 3×22+3×3 = 66+3=69

x/4 -9 =11

x/4 = 11 +9

x/4 = 20

x = 20×4

x = 80