Question

Hi! Can anybody help me with these problems? I have to do 2 step equations.

1. 3.8x + 5.2x - 6.7 = 11.3
2. 7.8y - 4.9 - 5.4y = 2.3
3. 2/3x - 5 = 1
4. 7/5y = 3 - 1/5

There are pictures below for the ones that have fractions ( 3 and 4)

Answer 1

Explanation:

for question number one you want to first combine like terms:

1. 9x-6.7=11.3
2. 9x=18
3. x=2

for number 2 you should teh smame:

1. 2.4y-4.9=2.3
2. 2.4y=7.2

so as long as you combine like terms then proceed to solve you should get the right answers

Answer 2

1) 3.8x + 5.2x - 6.7 = 11.3
9x = 11.3 + 6.7
9x = 18
x = 18/9
x = 2

2) 7.8y - 4.9 - 5.4y = 2.3
2.4y = 7.2
y = 7.2/2.4
y = 3

3)


`(2)/(3) x - 5 = 1`

`(2)/(3) x = 5 + 1`

`(2)/(3) x = 6`

Multiply by 3 by both sides:


`3 * (2)/(3) x = 3 * 6`

Simplify:

2x = 18
x = 18/2
x = 9

4)


`(7)/(5) y = 3 - (1)/(5)`

Do lowest common denominator:


`(7)/(5) y = ((5 * 3) - 1)/(5)`

`(7)/(5) y = (15 - 1)/(5)`

`(7)/(5) y = (14)/(5)`

Simplify by 5 by both sides:


`7y = 14`

`y = (14)/(7)`

`y = 2`