Odpowiedź :
c) 2(3-x) +7= 4x – 5(2+x)
6 - 2x + 7 = 4x - 10 - 5x
13 - 2x = -x - 10
-2x + x = -10 - 13
-x = -23
x = 23
b) 15 – 3(x-4) = 2x+ 2(3+x)
15 - 3x + 12 = 2x + 6 + 2x
27 - 3x = 4x + 6
-3x - 4x = 6 -27
-7x = -21
x = 3
c) 2(3-x) +7= 4x – 5(2+x)
6 - 2x + 7 = 4x - 10 - 5x
13 - 2x = -x - 10
-2x + x = -10 - 13
-x = -23
x = 23
b) 15 – 3(x-4) = 2x+ 2(3+x)
15 - 3x + 12 = 2x + 6 + 2x
27 - 3x = 4x + 6
-3x - 4x = 6 -27
-7x = -21
x = 3