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rezolva ecuatiile
1)5-2x+7=4
2)(4-x)*24-8=40
3)[(11-x):2+5]*6-40=8
4)2x-30=40
5)3a*36=108


Răspuns :

5-2X+7=4
2X=4-5-7
2X=-8,X=-8:(-2),X=4
2. (4-x)x24-8=40.94-x0x24=40+8,96-24x=48,-24x=48-96,-24x=-48,x=-48:(-24),x=2
3.[(11-x):2+5]x6-40=8,[(11-x):2+5]x6=40+8,[(11-x):2+5=48:6,(11-x):2=8-5,(11-x)=3x2,-x=6-11,-x=-5,x=5
4.2x-30=40,2x=40+30,2x=70,x=70:2,x=35
5.3a x 36=108,3a=108:36,3a=3,a=3:3,a=1