3/4x+1,8=1/3
3/4x+18/10=1/3
3/4x=1/3-18/10
3/410/30-54/30
3/4x=-44/30
x=-44/30÷3/4
x=-44/30*4/3
x=-176/90
3/4*(-176/90)+1,8=-44/30+1,8=-44/30+18/10=-44/30+54/30=10/30=1/3
1-3x 5x+4
____=__________
2 3
1-3x (5x+4)
____ - _________=0
2 3
3-9x (10x+8)
____ - _________=0
6 6
3-9x-10x-8
___________________=0
6
-5-19x
____________=0
6
-5-19x=0
-19x=5
x=-5/19
1-3*(-5/19) 1+15/19 19/19+15/19
____________=____________=______________=
2 2 2
=34/19*1/2=34/38=0,89
5*(-5/19)+4 -25/19+76/19
_________________=____________ = 51/19*1/3=51/57=0,89
3 3
0,8-1/2x 1,2+3
____________=__________
4 3
0,8-1/2x (1,2+3)
________________-_____________=0
4 3
8/10-1/2x 12/10+3
___________________-________________=0
4 3
3*(8/10-1/2x) 4*(12/10+3)
___________________-_______________=0
12 12
2,4-1,5x-(4,8+12)
______________________=0
12
2,4-1,5x-4,8-12=0
-1,5x=12+4,8-2,4
-1,5x=14,4
x=-9,6
0,8-1/2x 0,8-1/2*(-9,6) 0,8+4,8
_______________=____________= __________=1,4
4 4 4
1,2+3
____________=4,2÷3=1,4
3