Question

Resolver cada ecuacion y verifica la solucion
a: 12y-18=15
b: 13-7b+27= -56
c: 1/5w-3= -11/4
d: 8/7-1/2t=6/7

Answer 1

a)
12y-18 = 15
12y = 15 + 18
12y = 33
y = 33/12
y = 2,75

verificando
12y - 18 = 15
12(2,75) - 18 = 15
33 - 18 = 15
15 = 15

b)
13 - 7b + 27 = -56
13 + 56 + 27 = 7b
96. = 7b
96/7 = b
13,71 = b

verificando
13 - 7b + 27 = -56
13 - 7(13,71) + 27 = -56
13 - 95,97 + 27 = -56
40 - 95,97 = -56
- 55,97 = -56

c)
1/5w - 3. = 11/4
1/5w. = 11/4 + 3
1/5w. = 23/4
w. = 23/4 * 1/5
w. = 115/4


verificando
1/5w - 3. = 11/4
1/5(115/4) - 3. = 11/4
23/4 - 3 = 11/4
11/4 = 11/4