2x = 3 · 5 + 3
x = 12 / 3
x = 9
x = 6
3x = 7 · 2 − 5
x = 18 / 2
( 3x − 2 ) / 5 = 5 − 3
2x = 5 · 3 − 3
x = 9 / 3
( 3x + 5 ) / 2 = 2 + 5
x = 3
( 2x − 3 ) / 5 = 5 − 2
3x = 2 · 5 + 2
( 3 + 2x ) / 3 = 3 + 2
x = 12 / 2
x = 4
