Question

helpp plss!!
dau coroana

Answer 1

a). -5x-2x=-21-7
-7x=-28
x= -28/-7
x=4

b)1,6x-0,8x=1,6+0,8
0,8x=2,4
x=2,4/0,8
x=3

c).22x-11x=66+11
11x=77
x=77/11
x=7

d).-2×-10×=68-8
-12×=60
×=60/12
×=-5

Answer 2

a)7-5 x=2 x-21
7+21=2 x+5 x
7 x=28
X=28:7
X=4
b)1,6 x-0,8=0,8 x+1,6
1,6 x-0,8 x=1,6+0,8
0,8 x=2,4
X=2,4:0,8=3
c)-11+22 x=66+11 x
22 x-11 x=66+11
11 x=77
X=77:11
X=7
d)-2 x+8=68+10 x
-2 x-10 x=68-8
-12 x=60
X=-60:12
X=-5