2x + 4 =2 2k-3=k + 7 3(a-2)=a+2 tolong di jawab pake cara

2x + 4 = 2
2x = 2 - 4
2x = -2
x = -2/2
x = -1

2k - 3 = k + 7
2k - k = 7 + 3
k = 10

3(a-2) = a+2
3a - 6 = a + 2
3a - a = 2 + 6
2a = 8
a = 8/2
a = 4