Mr. Fong employed some welders and painters for his construction site. A painter was paid $7 a day and a welder was paid $18 a day. Given that he employed 3 times as many welders as painters and a total of $122 was paid to these workers for the day, how many less welders than painters did Mr. Fong employ for his site?
|
Welders |
Painters |
Difference |
Total |
Number |
3 u |
1 u |
2 u |
|
Value |
18 |
7 |
|
|
Total value |
54 u |
7 u |
|
61 u |
Number of painters = 1 u
Number of welders = 3 x 1 u = 3 u
Total amount paid
= (3 u x 18) + (1 u x 7)
= 54 u + 7 u
= 61 u
61 u = 122
1 u = 122 ÷ 61 = 2
Number of less painters than welders
= 3 u - 1 u
= 2 u
= 2 x 2
= 4
Answer(s): 4