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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)

Hi! Can anybody help me with these problems? I have to do 2 step equations. 1. 3.8x-example-1
Hi! Can anybody help me with these problems? I have to do 2 step equations. 1. 3.8x-example-1
Hi! Can anybody help me with these problems? I have to do 2 step equations. 1. 3.8x-example-2

2 Answers

2 votes

Answer:


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

User Probsolver
by
8.0k points
6 votes
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
User DivZero
by
8.6k points

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