2*(3x+70)=350 86-(2x+15)=39 (27x-81):3=18 (13x-63):7+86=90 решите плиз. Created by alkalike. matematika-ru

2*(3x+70)=350 86-(2x+15)=39 (27x-81):3=18 (13x-63):7+86=90 решите плиз...

August 2022 2 8 Report

2*(3x+70)=350
86-(2x+15)=39
(27x-81):3=18
(13x-63):7+86=90
решите плиз

belickovairina 6х+140=350
6х=350-140 27х-81=18*3
6х=210 27х-81=54
х=210/6 27х=54+81
х=35 27х=135
х=135/27
2х+15=86-39 х=5
2х+15=47
2х=47-15
2х=32 (13х-63)/7=90-86
х=32/2 (13х-63)/7=4
х=16 13х-63=4*7
13х-63=28
13х=28+63
13х=91
х=91/13
х=7

0 votes Thanks 2

roma74 86-(2x+15)=39 86-2x-15=39 -2x=-86+15+39 -2x=- x=16

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