Question

Use each diagram to solve x​

Answer 1

6x +3 =45 (Being alternate angle)

Or, 6x= 45 - 3

or,6x = 42

or,x=42÷6

hence,x =7

Answer 2

6x+3=45

6x+3-3=45-3

6x= 42

Divide by 6 for 6x and 42

6x/6= 42/6

x= 7

Check answer by using substitution method

6x+3= 45

6(7)+3= 45

42+3= 45

45= 45

The answer is x= 7