99.4k views
5 votes
−1.2x+2.5=0.8x+6.5

Solve for x

2 Answers

3 votes

Answer: x = - 2.0

Explanation:

We can find x by making it the subject of the equation and simplifying:

−1.2x+2.5=0.8x+6.5 [group like terms across the equal sign]

-1.2x - 0.8x = 6.5 - 2.5 [simplify]

- 2.0x = 4 [divide both sides by -2.0]

x = -2.0

Check:

−1.2(-2.0)+2.5 = 0.8(-2.0)+6.5

4.9 = 4.9 ✅

User Arn
by
8.3k points
5 votes

Answer:

x = -2

Explanation:

It's a matter of rearranging the equation to make x the subject. Simple arithmetic.

Original equation:

-1.2x + 2.5 = 0.8x + 6.5

Start moving constants with variables to left, and constants without variables to right:

-1.2x - 0.8x + 2.5 = 6.5

-1.2x - 0.8x = 6.5 - 2.5

Collect like terms

-2x = 6.5 - 2.5

-2x = 4

Divide both sides by -2 to make x the subject

x = 4/-2

x = -2

User Datz Me
by
7.8k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories