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2x = -25
2x - 5 = -25 - 5
2x - 5 = -30
semoga benar yaa... ;-)
3x - 5 = 3/5 (x + 4)
3x - 5 = 3/5 x + 12/5
3x - 3/5 x = 12/5 + 5 ----> pindah ruas
15/5 x - 3/5 x = 12/5 + 25/5
12/5 x = 37/5
x = 37/5 x 5/12
x = 185/60
x = 37/12
nilai 2x - 5
Subtitusikan nilai x = 37/12 ke 2x - 5
= 2 (37/12) - 5
= 74/12 - 5
= 74/12 - 60/12
= 14/12
= 7/6
Jadi, diperoleh nilai 2x - 5 adalah 7/6