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Answer:
1. 17 (age of Reyna), 34 (age of JP)
2. x=17.5
3. 1= 40 cm
2= 20 cm
Explanation:
1. Let
x be the age of Reyna
2x be the age of JP
x + 2x = 51
Solution:
x + 2x = 51
3x/3 = 51/3
x = 17 (age of Reyna)
2x = 2(17) = 34 (age of JP)
Checking:
17+34= 51 ✔️
2. 2(a number + 10)=55
Let
x be the number
Solution:
2(x+ 10)=55
2x + 20=55
2x=55-20 [transpost]
2x=35
2x/2=35/2
x=17.5
Checking:
2(x+ 10)=55
2(17.5+ 10)=55 [substitute the value of x]
2 (27.5)=55
55=55 ✔️
3. Solution:
60 x 1/3= 20 cm