Search 75,883 tutors
Ask a question
0 0

## what is 12 over 5 x - 2x = 3 over 10? by the way there are fractions (12/5 and 3/10) I don't get how to do equations with fractions, plase help. -Sdgaeth

plase help me   -Sdgaeth

# Comments

Is first coefficient
12
--- ,
5
2
or 1 ---  ?
5

Tutors, please sign in to answer this question.

# 2 Answers

(12/5x)-2x=3/10
Multiply each term by 10x to get rid of fractions
24-20x^2=3x
Set up quadratic equation
20x^2+3x-24=0
Solve using quadratic formula
x=(-3+/-sqt(3^2-4(20)(-24)))/(2*20)
=(-3+/-sqt(1929))/40
(12/5)x - 2x = 3/10

Let's multiply each term of given equation by 10 (just to get rid of denominators):

12                              3
10 • ---- x - 10 • 2x = 10 • ----
5                               10

24x - 20x = 3

4x = 3

x = 3/4 = 0.25

OR

2               3
1 --- x - 2x = ---
5              10

7                     3
---x  -  2x  =  ----
5                    10

7                                  3
10 • --- x  -  10 • 2x  =  10 • ----
5                                 10

14x - 20x = 3

- 6x = 3

x = - (1/2) = - 0.5