Question

Resolva as seguinte equações de 1°grau!
A) 3. (X+2) +4. (X-1)= 5.(X+2)
B)5-(X+1) +3= 4. (2X-4)
C) 5.(1-x)-2. (X+3)= 4.(3-x)

Answer 1

a) 3. (x+2) +4. (x-1)=5.(x+2)
 3x+6+4x-4=5x+10

7x-5x=10-6+4

2x=8
x=8/2
x=4

b)5-(x+1)+3=4.(2x-4)

5-x-1+3=8x-16
5-1+3+16=8x+x
23=9x
x=23/9
x=2,33... ou23/9

Answer 2

A) 3x+6+4x-4= 5x+5
3x+4x-5x = 5-6+4
7x-5x=3
X=3÷2 = 1.5

B) 5-(x+1)+3=8x-16
-(x+1)-8x=-16-5-3
-8x-8=-24
-8x = -16 x(-1)
X= 16÷8=2

C) 5-5x-2x-6= 12-5-+6
3x=13
X=13÷3= 4.3