Question

a)6(×+5)-3×=21
b)11-3(×+5)=2×+1
c)32-7(×-5)=3(×-1)
d)4(×-6+2×=18
e)4(×+7)-15=3×
f)14-8(×+3)=2×
g)16(×+3)-4=2×-42
Ecuatii de gradul 1

Answer 1

a) 6(X+5)-3X=21
6X+30-3X=21
6X-3X+30=21
3X+30=21
3X=21-30
3X=-9
X=-9 SUPRA 3
X=-3

b)11-3(X+5)=2X+1
11-3X-15=2X+1
-3X-4=2X+1
-3X-2X=+4+1
-5X=5
X=5 SUPRA -5
X=-1

c) 32-7(X-5)=3(X-1)
32-7X+35=3X-3
-7X+67=3X-3
-7X-3X=-67-3
-10X=-70
X= -70 SUPRA -10
X=7

d)4(X-6+2X=18 -UNDE E PUSA CEALALTA PARANTEZA ?

e) 4(X+7)-15=3X
4X+28-15=3X
4X+13=3X
4X-3X=-13
X=-13

f)14-8(X+3)=2X
14-8X+24=2X
-8X+38=2X
-8X-2X=-38
-10X=-38
X= -38 SUPRA -10
X= 3,8 SAU 19 SUPRA 5

g)16(X+3)-4=2X-42
16X+48-4=2X-42
16X-2X=-48+4-42
14X=-90+4
14X=-86
X=-86 SUPRA14
X=-6,1428571 SAU -43 SUPRA 7