Răspuns :
Răspuns: a) x= 4
b) x=34
c) x=6
d) x=85
Explicație pas cu pas: a) x+5+6=7+8 7+8=15
x+11=15
x=15-11
x=4
b) x-8-6=23-3 23-3=20
x-8-6=20
x=20+14
x=34
c) 4+3-x=100-99 100-99=1
7-x=1
x=7-1
x=6
d) 7+x+8=100 7+8=15
x+15=100
x=100-15
x=85
Răspuns: a) x= 4
b) x=34
c) x=6
d) x=85
Explicație pas cu pas: a) x+5+6=7+8 7+8=15
x+11=15
x=15-11
x=4
b) x-8-6=23-3 23-3=20
x-8-6=20
x=20+14
x=34
c) 4+3-x=100-99 100-99=1
7-x=1
x=7-1
x=6
d) 7+x+8=100 7+8=15
x+15=100
x=100-15
x=85