Question

escreva a equação do primeiro grau na forma geral (ax+b=0) dê os coeficientes (a,b) e determine a raiz(x=-b/a) a)5x-3=0 b)3x+10=7 )c)2/3x=1 d)3x+87=3+87x e)33x+10=28x-5 f)-5x+10=4.(8-x) g)4x-98=x/2 h)3.(x-7)+25=x+9/5

Answer 1

A) 5x-3=0
a= 5
b= -3
x=3/5

B) 3x+10=7
a= 3
b= 10
x=-3/3 => x = -1

C) 2/3x=1
a=3
b=2
x=-2/3

D) 3x+87=3+87x
84x=84
a=84
b=84
x= 1

E)33x+10=28x-5
5x=-15
x= -3

F) - 5x+10=4.(8-x)
-5x+10=32-4x
X=-22

G) 4x-98=x/2
4x-98-x/2=0
(4x.2-x)/2+98
7x/2=-98
7x=196
X=28

H) 3.(x-7)+25=x+9/5
3.x-3.7+25=x+9/5
3x-21+25=x+9/5
2x+4=9/5
2x=9/5-4
2x=-11/5
X=(-11/5)/2
X=- 11/10