12s - 29 < 50 - 3s - 25
Like terms
12s - 29 < 25 - 3s
+3s. +3s
S cancels
15s - 29 < 25
+ 29. +29
15s. < 54
/15. /15
S < 3.6
Answer:15
Step-by-step explanation: Debora has to take the numbers 3 and 5 and multiply. 3x5= 15
Answer:
A = 100 B = 130 C = 150
Step-by-step explanation:
Translated into a system of equations:
A+B+C = 380
B = A+30
C = B + 20
So we find B from the last one:
B = C-20
Plug it in the second one:
C-20 = A+30
A = C-50
Plug it in the first:
C-50 + C-20 + C = 380
3C - 70 = 380
3C = 450
C=150
A = C - 50 = 150 - 50 = 100
B = C - 20 = 150 - 20 = 130
Answer: e) 6
Step-by-step explanation:
Let x be mother + children = 18
Father's age = 38
Average age of the family = 14
38 + 18x /( x + 1 )= 14
Opening the bracket
38 + 18x = 14x + 14
Collecting like terms
24 = 4x
x = 6
no of children in the family is 6.
The answer should be p=-3
