Question

Help please 4.2 + 2.5a = 9.2

Answer 1

Answer: a = 2

Step-by-step explanation: 2.5 x 2 = 5 5 + 4.2 = 9.2

Answer 2

`4.2+2.5a=9.2`

Rearrange:

`2.5a+4.2=9.2`

Subtract 4.2 from both sides:

`2.5a+4.2-4.2=9.2-4.2`

`2.5a=5`

Divide both sides by 2.5:

`(2.5a)/(2.5) =(5)/(2.5)`

`\fbox{a = 2}`