Mr. Lau employed some welders and painters for his construction site. A painter was paid $9 a day and a welder was paid $20 a day. Given that he employed 3 times as many welders as painters and a total of $207 was paid to these workers for the day, how many more welders than painters did Mr. Lau employ for his site?
| |
Welders |
Painters |
Difference |
Total |
| Number |
3 u |
1 u |
2 u |
|
| Value |
20 |
9 |
|
|
| Total value |
60 u |
9 u |
|
69 u |
Number of painters = 1 u
Number of welders = 3 x 1 u = 3 u
Total amount paid
= (3 u x 20) + (1 u x 9)
= 60 u + 9 u
= 69 u
69 u = 207
1 u = 207 ÷ 69 = 3
Number of more welders than painters
= 3 u - 1 u
= 2 u
= 2 x 3
= 6
Answer(s): 6
