Find the X

Intro

An equation is given below.
4(x-7)= 0.3(x+2) +2.11

Sample Problem

Question source

The solution to the equation is
(1) 8.3 (3) 3
(2) 8.7 (4) -3

Solution

1. Use the distributive property.
4(x-7)= 0.3(x+2) +2.11
4x-28= 0.3x+0.6 +2.11

2. Add 0.6 and 2.11.
4x-28= 0.3x+2.71

3. Subtract 0.3x on both sides.
4x-28= 0.3x+2.71
-0.3x -0.3x
__________________
3.7X-28= 2.71

4. Add 28 on both sides.
3.7x-28= 2.71
+28 +28
_______________
3.7x= 30.71

5. Divide 3.7 on both sides to isolate the x.
3.7x/3.7= 30.71/3.7
x=8.3



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Hello. I am Kisung Yoon, and I am a senior in high school. I am currently in the ARISTA Honor Society, and I have tutored my fellow students from my school in Algebra I, Algebra 2, Global History, US History, and Biology. Not only that, I also tutored my younger sisters on the standardized tests mai...
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