Question

(3+a)x5x2=60. (2+a)x2x4=24. 2x3x(3+a)=54

Answer 1

(3+a)×5×2=60

3+a×10=60

3+a=60:10

3+a=6

a=6-3

a=3

_____________

(2+a)×2×4=24

2+a ×2=24:4

2+a=6:2

2+a=3

a=3-2

a=1

_______________

2×3×(3+a)=54

6×(3+a)=54

3+a=54:6

3+a=9

a=9-3

a=6

Answer 2

( 3 + a ) × 5 × 2 = 60

( 3 + a ) × 5 = 60 : 2

( 3 + a ) × 5 = 30

3 + a = 30 : 5

3 + a = 6

a = 6 - 3

a = 3


( 2 + a ) × 2 × 4 = 24

( 2 + a ) × 2 = 24 : 4

( 2 + a ) × 2 = 6

2 + a = 6 : 2

2 + a = 3

a = 3 - 2

a = 1


2 × 3 × ( 3 + a ) = 54

6 × ( 3 + a ) = 54

3 + a = 54 : 6

3 + a = 9

a = 9 - 3

a = 6