Question

qual o valor de x dessas equações x+13=4 c)2x-5=3 d)5x+7=-2x-8 e)7x+2=5

Answer 1

a) x=4-13
x=-9

c)2x=8
x=8/2
x=4

d)5x-2x=-8(-7)
3x=-15
x=-15/3
x=-5

e)7x=5-2
7x=3
x=3/7

Answer 2

a) x= 13-4  x=9
c) 2x-5=3 2x=5+3 x=8/2 x=4
d) 5x+7=-2x-8 5x+2x=-8-7 3x=-15 x=-15/3  x=-5
e) 7x+2=5 7x=5-2 7x=3 x=3/7