Question

calcule o valor de x de modo que : a) 2x + 3 = 15 b) 7x - 1 = 13 c) 2x - 4 = 3 d) 4x + 2 = - 18 e) 5x - 2 = 7 + 6 f) 10x + 1 = -4 - 5 coloquem a conta pfv me ajudem

Answer 1

a) 2x + 3 = 15
2x = 15-3
2x = 12
x = 12/2
x = 6

b) 7x - 1 = 13
7x = 13 + 1
7x = 14
x = 14/7
x = 2

c) 2x - 4 = 3
2x = 3+4
2x = 7
x = 7/2

d) 4x + 2 = -18
4x = -18-2
4x = -20
x = -20/4
x = -5

e) 5x - 2 = 7+6
5x - 2 = 13
5x = 13+2
5x = 15
x = 15/5
x = 3

f) 10x + 1 = -4-5
10x + 1 = -9
10x = -9-1
10x = -10
x = -10/10
x = -1

Answer 2

a)2x=15-3
2x=12
x=12/2
x=6
b)7x=13+1
7x=14
x=14/7
x=2
c)2x=3+4
2x=7
x=7/2
d)4x=-18-2
4x=-20
x=-20/4
x=-5
e)5x=7+6+2
5x=15
x=15/5
x=3
f)10x=-4-5-1
10x=-10
x=-10/10
x=-1