Question

a+b=153 , b-3=a afla a,b

Answer 1

$a + b = 153$

$a = 153 - b$

$b - 3 = a$

$b - 3 = 153 - b$

$b + b = 153 + 3$

$2b = 156$

$b = 156 \div 2$

$b = 78$

$a = b - 3$

$a = 78 - 3$

$a = 75$

Answer 2

a + b = 153

b - 3 = a ⇒ b = a + 3

a + ( a + 3 ) = 153

2 a = 153 - 3

a = 150 : 2

a = 75

b = 75 + 3 = 78

Verific: 75 + 78 = 153