Question

A)2(2-x)+3(2x+4)=7 б)6x-4/5 - 2-x/4 = 3x+1/2

Answer 1

4-4x+6x+12=7
10x=-9:10
x=-0,9

Answer 2

A)2(2-x)+3(2x+4)=7
4-2x+6x+12=7
16+4х=7
4х=7-16
4х=-9
х=-9/4
х=-2 1/4
х=-2,25



б)6x-4/5 - 2-x/4 = 3x+1/2
б)6x-x/4-3x=1/2+4/5+2
2 3/4х=0,5+0,8+2
2 3/4=3,3
х=3,3:11/4
х=1,2