1. Решите уравнения: 1) –4,8х + 8 = 1,6х – 11,2 2) 2 ∙ (0,6х – 3) = 3 ∙ (–0,1х + 3)

Question

1. Решите уравнения: 1) –4,8х + 8 = 1,6х – 11,2
2) 2 ∙ (0,6х – 3) = 3 ∙ (–0,1х + 3)

Answer 1

▪1) –4,8х + 8 = 1,6х – 11,2
–4,8х - 1,6х = – 11,2 - 8
-6,4х = -19,2
х= -19,2÷(-6,4)
х= 3
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Проверка:
–4,8×3 + 8 = 1,6×3 – 11,2
-14,4+8=4,8 - 11,2
-6,4= -6,4

▪2) 2 ∙ (0,6х – 3) = 3 ∙ (–0,1х + 3)
1,2х - 6 = -0,3х + 9
1,2х + 0,3х = 9 +6
1,5х = 15
х=15 ÷ 1,5
х=10
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Проверка:
2 ∙ (0,6×10 – 3) = 3 ∙ (–0,1×10 + 3)
2(6 - 3) = 3(-1 + 3)
2 × 3 = 3 × 2
6 = 6