Question

informe o valor da incognita
x-5=-13
a+7=-9
c-10=-1
6x+4=2x-10
2y-25=10y+3
3x+3-2x=-12
y+40-y=-5y-5
4-2b=4b+20

Answer 1

a) x - 5 = 13

x = -13 + 5
x = -8
.
.
.
b) a + 7 = -9

a = -9 - 7
a = -16
.
.
.
c) c - 10 = -1

c = -1 + 10
c = 9
.
.
.
d) 6x + 4 = 2x - 10

6x - 2x = -10 - 4
4x = -14
x = -14/4
x = -7/2
.
.
.
e) 2y - 25 = 10y + 3

2y - 10y = 3 + 25
-8y = 28
y = 28/-8
y = 7/-2
.
.
.
f) 3x + 3 - 2x = -12

3x - 2x = -12 - 3
x = -15
.
.
.
g) y + 40 - y = -5y - 5

y - y + 5y = -5 - 40
5y = -45
y = -45/5
y = -9
.
.
.
h) 4 - 2b = 4b + 20

-2b - 4b = 20 - 4
-6b = 16
b = 16/-6
b = 8/-3





★Espero ter ajudado! tmj