Answer:
<u>The sum of their ages now is 13</u>
Step-by-step explanation:
Dally's age = x
Dilly's age = x - 7
In 4 years time Dilly will be half Dally’s age, therefore:
Dilly's age plus four equals to half of Dally’s age plus four,
replacing with the values and variables we know:
x - 7 + 4 = (x + 4) /2
x - 3 = (x + 4) /2
2x - 6 = x + 4 (Multiplying by 2 at both sides)
2x - x = 4 + 6 (Like terms)
x = 10 ⇒ x - 7 = 3
<u>The sum of their ages now is 13 (10 + 3)</u>
Answer:
y=6
Step-by-step explanation:
y=3-x
x=-3
y=3-(-3)
y= 3+3
y=6
Answer:
x=9
Step-by-step explanation:
dyyfjfjsjujsjsivjsjicuejie82iu3828i$>÷>$>$>×&$:
Answer: 25%
Step-by-step explanation:
+60 two negatives equal a positive
