Answer:
11. 5(x+y) =500
12. B + 15 = 26
13. x + 4y = z
14-15. 3x+2y = 1000
Step-by-step explanation:
13. given:
x = price of 6 packs of 1kg. sugar = 336
y = price of a permanent marker = 17
find:
z = ?
solution:
x + 4y = z [substitute the values of x and y]
336 + 4(17) = z [multiply by 17 by 4, then perform the operation]
404 = z
Therefore, the total cost of the items she bought is ₱404.00.
14. given:
x = price of a face towel = 79
y = price of a pair of socks = 120
solution:
3x+2y = 1000 [substitute the values of x and y]
3(79) + 2(120) = 1000 [multiply 79 by 3 and 120 by 2]
237 + 240 = 1000 [perform the operation]
477 = 1000 [transpose 477]
1000 - 477 = 523
Therefore, her change from ₱1000.00 is ₱523.00.