а) 1,5(1 + x) = 4,1,5 + 1,5x = 4,1,5x = 4,5 - 1,1,5x = x = 3 / 1,x = 2
б) 2(x - 7) = 2x - 14 = 2x = 1 + 12x = 1x = 15 / x = 7,5
а) 1,5(1 + x) = 4,
1,5 + 1,5x = 4,
1,5x = 4,5 - 1,
1,5x =
x = 3 / 1,
x = 2
б) 2(x - 7) =
2x - 14 =
2x = 1 + 1
2x = 1
x = 15 /
x = 7,5