Answer:
a) x=5
b) x=6
Step-by-step explanation:
a)
3x+7=180-(10x-22)
3x+7=202-10x
13x=195
x=5
b)
11x-3=4x+39
7x=42
x=6
I am so sorry I forgot what the formula names are but these are the correct solutions. It has been a while since I've done Geometry.
Step-by-step explanation:
30% = 3/10
number of sixth grade students = 3/10 × 620
divide by denominator
620 ÷ 10 = 62
multiply by numerator
62 × 3 = 186
Therefore there are 186 sixth grade students
The easy way is just to divide by 3
15% /3 = 5%
Since you have divided the % by 3 you can divide the 375 by 3
375 / 3 = 125
Answer 125
Subtract 60 on both sides to get -40.
You are left with 40x=-40
Divide both sides by 40 to leave x by itself.
You get x=-1.