Question

stiind ca a + b = 6, determinati numarul x din 4 * a + 3 * x + 4 * b= 66.

Answer 1

4(a+b)+3x=66
4•6+3x=66
3x=66-24
3x=42
x=14

Answer 2

a + b = 6

4 a + 3 x + 4 b = 66

3 x + 4 a + 4 b = 66

3 x + 4 ( a + b ) = 66

3 x + 4 · 6 = 66

3 x + 24 = 66

3 x = 66 - 24

3 x = 42

x = 42 : 3

x = 14