Question

exercícios:
a) (4/10) x-1 =(625/100) 6x-5
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Answer 1

    (4/10)x - 1 = (625/100) × 6x - 5 ⇔

⇔ (40/100)x - 100/100 = (625/100) × 6x - 500/100 ⇔

⇔ 40x - 100 = 625 × 6x - 500 ⇔

⇔ 8x - 20 = 125 × 6x - 100 ⇔

⇔ 8x - 20 = 750x - 100 ⇔

⇔ 750 - 8x = -20 + 100 ⇔

⇔ 742x = 80 ⇔

⇔ x = 80/742 ⇔

⇔ x = 40/371