Question

c)2(×-1)=3×+4
d)3(×-1)-7=15
e)7(×-4)=2×-3
f)3(×-2)=4(3-×)
g)3(3×-1)=2(3×+2)
h)7(×-2)=5(×+3)
i)3(2×-1)=-2(×+3)
j)5×-3*×+2)=15
resolva as equações ​

Answer 1

c~ 2(x-1)=3x+4
2x-2=3x+4
2x-3x=4+2
-x=6
c=-6

d~3(x-1)-7=15
3x-3-7=15
3x-10=15
3x=15+10
3x=25
x=25/3
x= 8 1/3, x=8.3

e~7(x-4)=2x-3
7x-28=2x-3
7x-2x=-3+28
5x=25
x=5

f~3(x-2)=4(3-x)
3x-6=12-4x
3x+4x=12+6
7x=18
x=18/7

g~3(3x-1)=2(3x+2)
9x-3=6x+4
9x-6x=4+3
3x=7
x=7/3

h~7(x-2)=5(x+3)
7x-14=5x+15
7x-5x=15+14
2x=29
x=29/2

i~3(2x-1)=-2(x+3)
6x-3=-2x-6
6x+2x=-6+3
8x=-3
x=-3/8

j~(5x-3x+2)=15
2x+2=15
2x=15-2
2x=13
x=13/2