Odpowiedź :
a)
2x+8=16|-8
2x=8|÷2
x=4
b)
48-7=x+9
41=x+9|-9
32=x
c)
3(x+2)=2x-7
3x+6=2x-7|-6
3x=2x-13|-2x
x=-13
A
2x + 8 = 16 / - 8
2x = 16 - 8
2x = 8 / :2
x = 4
B
48 - 7 = x + 9 / -9
48 - 7 - 9 = x
x = 32
C
3(x + 2) = 2x - 7
3x + 6 = 2x - 7 / -6
3x = 2x - 13 / -2x
3x - 2x = -13
x = - 13