0.6*(х+7)=0.5*(х-3)+6.8 и |0.63|:|х|=|-0.9|

Question

0.6*(х+7)=0.5*(х-3)+6.8

и |0.63|:|х|=|-0.9|

Answer 1

0,6х+4,2=0,5х-1,5+6,8
0,1х=6,8-1,5-4,2
0,1х=1,1
х=1,1:0,1
х=11

I0.63I=0.63
I-0.9I=0.9
0.63:x₁=0.9
x₁=0.63:0.9
x₁=0.7
0.63:(-x₂)=0.9
x₂=-0.7