How do you solve 8(a-2)<=10(a+2)8(a2)10(a+2)?

1 Answer
Apr 16, 2018

a >= -18a18

Explanation:

We solve inequalities similarly to equations.

8(a-2) <= 10(a+2)8(a2)10(a+2)

First, let's distribute:
8a - 16 <= 10a + 208a1610a+20

Now subtract 8a8a from both sides of the inequality:
8a - 16 quadcolor(red)(-quad8a) <= 10a + 20 quadcolor(red)(-quad8a)

-16 <= 2a + 20

Subtract 20 from both sides of the inequality:
-16 quadcolor(red)(-quad20) <= 2a + 20 quadcolor(red)(-quad20)

-36 <= 2a

Divide both sides by 2:
(-36)/color(red)(2) <= (2a)/color(red)(2)

-18 <= a

Put a on the left side of the inequality:
a >= -18

This means that a must be more than or equal to -18.

Hope this helps!