_________1. The product of seven and a number yields fifteen.
_________2.The Sum of a number and twenty - six is forty.
_________3.Twice a number decreased by eight equals ten.
_________4.The ratio of six times a number and five becomes twelve.
_________5. Three less than a number result to thirty- one
_________2.The Sum of a number and twenty - six is forty.
_________3.Twice a number decreased by eight equals ten.
_________4.The ratio of six times a number and five becomes twelve.
_________5. Three less than a number result to thirty- one
Answers & Comments
Answer:
1. let the number be x.
7x=15 (divide both sides by 7)
x=15/7
therefore, the number is 15/7
2. let the number be x.
26+x=40 (subract both sides by 26)
x=24
therefore, the number is 24
3. 2x-8=10 (add 8 to both sides)
2x=18 (divide both sides by 2)
x=9
therefore, the number is 9.
4. 6x:5=12
can be written as 6x/5=12, cross multiply.
6x=60
x=10
therefore the number is 10.
5. x-3=31
x=31+3
x=34