Реши уравнения (1) 4x+5x+4.7=16.4 (3) (35.8-x):2.1=1.3 (2) 0.7x-0.4x+46=211 (4)...

Question

Реши уравнения
(1) 4x+5x+4.7=16.4 (3) (35.8-x):2.1=1.3
(2) 0.7x-0.4x+46=211 (4) 0.9(283-x)=17.01

Answer 1

1)4х+5х=16.4-4,7
9х=11,7
х=1.3
2)0.7х-0,4х=211-46
0,3х=165
х=550

Comments

4)254.7-0,9х=17.01

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-0.9х=17.01-254.7

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-0.9х=-237,69

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х=264.1