13х+3х-х=450 помогите

Question

13х+3х-х=450 помогите

Answer 1

16х-х=450;15х=450; х=30

Comments

15х=450 х= 450/30 х= 15

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15

Answer 2

13х + 3х - х =450
15х= 450
х = 450: 15
х= 30
3х = 30 * 3
3х = 90
13х= 450 - 120
13х = 330
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330 + 90  + 30 =450
                 450=450

Comments

х = 15