Question

Resolva as equações:
A) 4x+8=3x-5
B)3a-4=a+1
C) 9y-11= -2
D) 5x -1= 8x+5

Answer 1

A) 4x+8=3x-5 4x-3x =-5-8 X= -13 B)3a -4 = a+1 3a -a = 1+4 2a = 5 a= 5/2 a = 2,5 C) 9y -11 = -2 8u =-2+11 9y= 9 y = 9/9 y=1 D) 5x -1 = 8x + 5 5x - 8x = 5+1 -3x = 6

Answer 2

a) 4X+8=3X-5
4X-3X=5-8
X=-3

b) 3a-4=a+1
3a-a=1+4
2a=5
a=5÷2
a=2,5

c) 9y-11=-2
9y=-2+11
9y=14
y=14÷9
y= 1,55...

d) 5X-1=8X+5
5X-8X=5+1
-3X=6
-X=6÷3
-X=2
-X=2 • -1
X=2