# 0.2 + r = 0.2r − 0.06 + 0.3r?

Solve for r

Relevance

0.2 + r = 0.2r − 0.06 + 0.3r

Fist, let's simplify the right side side:

r + 0.2 = 0.5r − 0.06

Next, isolate r and simplify.

(r + 0.2) - 0.5r - 0.2 = (0.5r − 0.06) -0.5r - 0.2

r - 0.5r = -0.06 - 0.2

0.5r = -0.26

(0.5r) / 0.5 = (-0.26) / 0.5

r = -0.52

0.2 + r = 0.2r − 0.06 + 0.3r

put like terms together first. Remember to change the sign when taking a term to the other side.

-0.2r-0.3r+r = -0.06-0.2 ------> now just do the math

0.5r = -.26 -------> to isolate the r we need to divide by its coefficient, which in this case would be 0.5.

0.5r/0.5 = -.26/0.5 -------> remeber that what you do to the left you must do to the right, so divide both sides by 0.5.

r = -0.52

0.2 + r = 0.2r − 0.06 + 0.3r

r - 0.5r = -0.06 - 0.2

0.5r = -0.26

... 0.5 is 1/2, so lets double everything

r = -0.52

• Xiomy
Lv 6

0.2 + r = 0.2r - 0.06 + 0.3r

0.2 + r = 0.5r - 0.06

r - 0.5r = -0.06 - 0.2

0.5r = -0.26

r = -0.52

• Como
Lv 7

20 + 100r = 20r - 6 + 30r

50r = - 26

r = - 26 / 50

r = - 13 / 25

0.2+r=0.2r-0.06+0.3r

0.2+r=0.5r+0.06

.26= -0.5r

-0.52=r

Some people can do simple math.

0.2 + r = 0.2r - 0.06 + 0.3r

1.5 r = - 0.26

r = - 0.26 / 1.5 = - 0.17333 (to 5 dp)

• 4 years ago

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• Anonymous

1.) combine like terms ------ .2+ r = 0.5r-.06

2.) get variables to one side and constants to the other -----

.26= -0.5r

3.) solve for r .26/-0.5 = r

r = -.52