2(2.9X+3.1X-4.6X+5)=66

Question

2(2.9X+3.1X-4.6X+5)=66

Answer 1

2.9x+3.1x-4.6x+5=33
1.4x+5=33
1.4x=33-5
1.4=28
x=20;

Comments

огромное спасибо

Answer 2

5.8х+6.2х-9.2х+10=66
5.8х+6.2х-9.2х=66-10
2.8х=55
х=55:2.8
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