Question

1. X+(-5+1)-6=-(-7)+1

2. 2(x-3)-8=-18

Dau multe puncte

Answer 1

Răspuns:

Explicație pas cu pas:

$1.~x+(-5+1)-6=-(-7)+1\\x-4-6=7+1\\x-10=8\\x=10+8\\\boxed{x=18}\\\\2(x-3)-8=-18\\2(x-3)=-18+8\\2(x-3)=-10|:2\\x-3=-5\\x=-5+3\\\boxed{x=-2}$

Answer 2

Răspuns:

Explicație pas cu pas:

x+(-5+1)-6 = -(-7)+1 <=> x-4-6 = 7+1 <=> x-10=8 <=> x = 10+8 => x = 18

2(x-3)-8 = -18 <=> 2x-6-8 = -18 => 2x = -18+14 => 2x = -4 => x = -4:2 =>

x = -2