Question

vamos resolver às seguintes equações do 1 grau Com uma incoginita sendo u =Q

Answer 1

a) 5x-40=2-x
5x+x=2+40
6x=42
x=42/6
x=7
b) 20+6x=-2x+26
6x+2x=26-20
8x=6
x=6/8 (:2)
x=3/4
c) 3,5x+1=3+3,1x
3,5x-3,1x=3-1
0,4x=2
x=2/0,4
x=5
d) 7p+15-5p-10=-17+13p
7p-5p-13p=-17+10-15
7p-18p=-7-15
-11p=-22.(-1)
11p=22
p=22/11
p=2
e) 13y-5=11+9y
13y-9y=11+5
4y=16
y=16/4
y=4
f) 9t-14=7t+20
9t-7t=20+14
2t=34
t=34/2
t=17
g) 5-a-11=4a-22
-a+4a=-22+11-5
3a=-11-5
3a=-16
a=-16/3
h) 2y+21-6y=-12+y-7
2y-6y-y=-12-7-21
2y-7y=-40
-5y=-40.(-1)
5y=40
y=40/5
y=8