How do you solve |7+ 7r | + 5= 40?
2 Answers
Mar 26, 2018
Answer:
Explanation:
Mar 26, 2018
Explanation:
"subtract 5 from both sides"
rArr|7+7r|=35
"the expression inside the absolute value can be positive"
"or negative"
color(magenta)"Positive expression"
rArr7+7r=35larrcolor(blue)"subtract 7 from both sides"
rArr7r=28larrcolor(blue)"divide both sides by 7"
rArrr=4
color(magenta)"Negative expression"
-7-7r=35larrcolor(blue)"add 7 to both sides"
rArr-7r=42larrcolor(blue)"divide both sides by "-7
rArrr=-6
color(blue)"As a check"
r=4rArr|35|+5=35+5=40color(white)(x)✔︎
r=-6rArr|-35|+5=35+5=40color(white)(x)✔︎
rArrx=-6" or "x=4" are the solutions"