tolong dijawab ya kak dibutuin nanti

1. a. x - 7 = 3
x = 3 + 7
x = 10
b. 6 - x = 2
- x = 2 - 6
- x = - 4
x = 4 (negatif bagi negatif = positif)
c. 2x + 5 = 7
x = (7 - 5)/2
x = 2/2
x = 1
d. x - 2 = 8 - x
x + x = 8 + 2
2x = 10
x = 10/2
x = 5