Răspuns :
a) 6×(3x+9)= -72
3x=6×9+72
3x=54+72
3x=126
x=126:3
x=42
b)8×(5x+8)= -96
5x=8×8+96
5x=64+96
5x=160
x=160:5
x=32
c)-9×(6x+4)=180
6x=-9×4+180
6x=5+180
6x=185
x=185:6
x=31,2
d)-2×(7x-15)= -156
7x= -2×15+156
7x=13+156
7x=169
x=169:7
x=255,5
SPER CA TE-AM AJUTAT! ! ! COROANA?
3x=6×9+72
3x=54+72
3x=126
x=126:3
x=42
b)8×(5x+8)= -96
5x=8×8+96
5x=64+96
5x=160
x=160:5
x=32
c)-9×(6x+4)=180
6x=-9×4+180
6x=5+180
6x=185
x=185:6
x=31,2
d)-2×(7x-15)= -156
7x= -2×15+156
7x=13+156
7x=169
x=169:7
x=255,5
SPER CA TE-AM AJUTAT! ! ! COROANA?