Question

2.5x - 6.4 + 1.2x = 21.35
please show step by step!!​

Answer 1

x as a fraction 7
`(1)/(2)`

x as a decimal: 7.5

Explanation:

2.5x - 6.4 + 1.2x = 21.35

Combine 2.5x and 1.2x to get 3.7x.

3.7x - 6.4 = 21.35

Add 6.4 to both sides.

3.7x = 21.35 + 6.4

Add 21.35 and 6.4 to get 27.75.

3.7x = 27.75

Divide both sides by 3.7.

x =
`(27.75)/(3.7)`

Expand
`(27.75)/(3.7)` by multiplying both numerator and the denominator by 100.

x =
`(2775)/(370)`

Reduce the fraction
`(2775)/(370)` to lowest terms by extracting and canceling out 185.

x =
`(15)/(2)`

simplify

7
`(1)/(2)`

Hope it helps and have a great day! =D

~sunshine~

Answer 2

Answer: x=7.5

Explanation:

2.5x - 6.4 + 1.2x = 21.35

3.7x-6.4=21.35

3.7x=21.35+6.4

3.7x=27.75

3.7x/3.7=27.75/3.7

x=7.5