0.7х+5(5х-1)=6.5+2.7х
0.7х+25х-5=6.5+2.7х
0.7х+25х-2.7х=6.5+5
23х=7
х=3.2
0.3(0.4х-1.2)+0.36х=3
0.12х-0.36+0.36х=3
0.48х=3+0.36
0.48х=3.36
х=7
0.6(х-0.6)+0.8(х-0.4)=1
0.6х-0.36+0.8х-0.32=1
0.14х=1+0.32+0.36
0.14х=1.68
х=12
1)0.7х+25х-5=6.5+2.7х
0.7x+25x-2.7x=6.5+5
23x=11.5
x=0.5
2)0.12x-0.36+0.36x=3
0.48x=3.36
x=7
3)0.6x-0.36+0.8x-0.32=1
1.4x=1.68
x=1.2
0.7х+5(5х-1)=6.5+2.7х
0.7х+25х-5=6.5+2.7х
0.7х+25х-2.7х=6.5+5
23х=7
х=3.2
0.3(0.4х-1.2)+0.36х=3
0.12х-0.36+0.36х=3
0.48х=3+0.36
0.48х=3.36
х=7
0.6(х-0.6)+0.8(х-0.4)=1
0.6х-0.36+0.8х-0.32=1
0.14х=1+0.32+0.36
0.14х=1.68
х=12
1)0.7х+25х-5=6.5+2.7х
0.7x+25x-2.7x=6.5+5
23x=11.5
x=0.5
2)0.12x-0.36+0.36x=3
0.48x=3.36
x=7
3)0.6x-0.36+0.8x-0.32=1
1.4x=1.68
x=1.2