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5x-2+3 (2x+3)=18 si 2x+6 (x+4)=104

Răspuns :

5x-2+3(2x+3)=18...5x-2+6x+9=18...11x+7=18...11x=18-7...11x=11..x=11:11...x=1

2x+6(x+4)=104...2x+6x+24=104...8x+24=104...8x=104-24...8x=80...x=80:8...x=10
1). 5x-2+6x+9=18
5x+6x=18-9+2
11x=11
x=1

2). 2x+6+6x+24=104
2x+6x=104-24-6
8x=74
x=74/8