Question

Matemática ·
5+3 pts ·











A 2 x + 5 x + 3 = 17
B 2 x - 3 + x = - 5 x + 13
C 2 • ( x - 1) + 3 = x + 5
D 3 - 2 • ( x + 1) + 4 = 2 - x

Answer 1

a)
2x+5x+3=17
7x=17-3
7x=14
x=14/7
x=2

b)
2x-3+x= -5x+13
2x+5x=13+3
7x=16
x=16/7

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

d)
3-2. (x+1)+4=2-x
3-2x-2+4=2-x
-2x+x=2-3+2-4
-x= -3------>×( -1 )
x=3