Question

Pamela is 12 years older than jiri the sum of their ages is 78 what is jiri’s age

Answer 1

Answer:

33

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please I only need two more :C

Step-by-step explanation:

78 - 12 = 66

66 ÷ 2 = 33

Answer 2

Answer:

Jiri's age is 33 years old

Step-by-step explanation:

let Pamela's age be = x

let Jiri's age be = y

pamela is 12 years older than Jiri

x = 12+y

sum of their age is 78

x+y = 78

use the substitution method to solve this question

x = 12+y -------- (1)

x+y = 78 --------- (2)

substitute (1) into (2)

x+y = 78

12+y+y = 78

12+2y = 78

2y = 78-12

2y = 66

y = 33