1)4(9-5x)+7x=11-2(8x+1)2) 9x-3(12-7x)=5(6x-7)-1. Created by melina3. matematika-ru

1)4(9-5x)+7x=11-2(8x+1)2) 9x-3(12-7x)=5(6x-7)-1...

August 2022 2 2 Report

1)4(9-5x)+7x=11-2(8x+1)
2) 9x-3(12-7x)=5(6x-7)-1

Verified answer

1) 36 - 20x + 7x = 11 - 16x - 2
-13x + 16x = 9 - 36
3x = -27
x = -9

2) 9x - 36 + 21x = 30x - 35 - 1
30x - 36 = 30x - 36
x∈R

crazybaby2016

Verified answer

1) 4(9-5х)+7х=11-2(8х+1)
36-20х+7х=11-16х-2
-20х+7х+16х=11-36-2
3х=-27
х=-9
2) 9х-3(12-7х)=5(6х-7)-1
9х-36+21х=30х-35-1
9х+21х-30х=36-35-1
0х=0 (х это любое число)

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