1.4(3-x)-0.9(x+2)=4.7
4.2-1.4x-0.9x-1.8-4.7=0
-2.3x-2.3=0 |*(-1)
2.3x+2.3=0
2.3x=-2.3
x=-1
1.4*(3-х)-0.9*(х+2)=4.7
4.2-1.4х-0.9х-1.8=4.7
-2.3х=4.7-4.2+1.8
-2.3х=2.3
х=2.3:(-2.3)
х=-1
1.4(3-x)-0.9(x+2)=4.7
4.2-1.4x-0.9x-1.8-4.7=0
-2.3x-2.3=0 |*(-1)
2.3x+2.3=0
2.3x=-2.3
x=-1
1.4*(3-х)-0.9*(х+2)=4.7
4.2-1.4х-0.9х-1.8=4.7
-2.3х=4.7-4.2+1.8
-2.3х=2.3
х=2.3:(-2.3)
х=-1