Answer:
first you need to factorize
the answer is 107
x
−
40
Women age = 3 + 2 S (sons age) (three times more twice her sons age)
their age sum is 84
so women age + son age = 84
lets substitute the value of mothers age
3+2S+S=84
3S=84-3
3S=81
S=27
so sons age is 27
Answer:
x = 5
Step-by-step explanation:
1/5(3x - 15) = -4(3/5x - 3)
Distribute the 1/5 in.
3x/5 - 3 = -4(3/5x - 3)
Distribute the -4 in.
3x/5 - 3 = -12x/5 + 12
Multiply both sides by 5.
3x - 15 = -12x + 60
Add 15 to both sides.
3x = -12x + 75
Add 12x to both sides.
15x = 75
Divide both sides by 15 to get
x = 5
Proof:
1/5(3x - 15) = -4(3/5x - 3)
1/5(3(5)-15) = -4(3/5(5) - 3)
1/5(15 - 15) = -4(3 - 3)
1/5(0) = -4(0)
0 = 0
