Question

решите уравнение: 1.1-2 21=53x; 6.75x=2 41x-9; 16-9 21y=3y+21; 1 41y+7.5=5y; 0.5x-7=-32x; 6y-2 54=2.5y.

Answer 1

4(1-х) = 3(2х+3)
4-4х = 6х+9
-4х-6х=9-4
-10х=5(-10)
х= -0,5

12х-(7-3х)=4х
12х - 7 + 3х = 4х
12х + 3х - 4х = 7
11х = 711
х= 711

8х + 3 = 1-(2х+4)
8х+3=1-2х-4
8х+2х=-4+1-3
10х=-9
х= -0,9