Помогите решить уравнения 7)7b+6b-29=374 8)19y-12y-47=1388. Created by 5595. matematika-ru

Помогите решить уравнения 7)7b+6b-29=374 8)19y-12y-47=1388...

August 2022 2 2 Report

Помогите решить уравнения 7)7b+6b-29=374 8)19y-12y-47=1388

AzStyle 7)
7b + 6b - 29 = 374
13b = 374 + 29
13b = 403
b = 403 : 13
b = 31
------------------------------------
7 * 31 + 6 * 31 - 29 = 374
217 + 186 - 29 = 374
403 - 29 = 374
374 = 374

8)
19y - 12y - 47 = 1388
7y = 1388 + 47
7y = 1435
y = 1435 : 7
y = 205
--------------------------------------------
19 * 205 - 12 * 205 - 47 = 1388
3895 - 2460 - 47 = 1388
1388 = 1388

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Inf777

Verified answer

7) 13b=374+29
13b=403
b=31
8)7y=1388+47
7y=1435
y=205

1 votes Thanks 1

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