The number of adult's masks sold is 63
Let the number of children's masks be represented by x
Let the number of adult's masks be represented by y.
Based on the information given, the equation to solve the question will be:
x + y = 100 ....... i
3x + 5y = 426 ....... ii
From equation i, x = 100 - y ..... iii
Put equation iii into ii
3x + 5y = 426
3(100 - y) + 5y = 426
300 - 3y + 5y = 426
Collect like terms
-3 + 5y = 426 - 300
2y = 126
y = 126/2
y = 63
The number of adult's mask sold is 63
Read related link on:
https://brainly.com/question/24429956
