СРОЧНО 1) 5х=2х-1 2) 4х+21=2х 3) 8х+21 = 2х

Question

СРОЧНО 1) 5х=2х-1 2) 4х+21=2х 3) 8х+21 = 2х

Answer 1

1) 5x=2x-1
5x-2x=-1
3x=-1
X=-1÷3
X=-1/3
2)4x+21=2x
4x-2x=-21
2x=-21
X=-21÷2
X=-10,5
3)8x+21=2x
8x-2x=-21
6x=-21
X=-21÷6
X=-3,5

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