Question

Equação de primeiro grau

a)2×+3=15
b)5×+3=16
c)X+X+8=54
d)5×+15=4×-8+6
e)4×-10=2×+2
f)2×+1=4×-7​

Answer 1

A) 2x+3= 15
2x = 15-3 = 12
2x = 12
X = 12/2 = 6

B) 5x+3= 16
5x = 16 -3 = 13
X= 13/5 = 2,6

C) x+x+8= 54
2x+8 = 54
2x = 54-8 = 46
X = 46/2 = 23

D) 5x+15=4x-8+6
5x-4x=-8+6-15
1x= 17 = 17/1 = 17

E) 4x-10=2x+2
4x-2x=2+10
2x=12
X=12/2 = 6

F) 2x+1=4x-7
2x-4x=-7-1
-2x=-8
X= -8/-2= 4