Question

Tentukan persamaan dan pertidaksamaan berikut:
a. 2+11/b = 7 1/2
b. 2x-6≥8x+5
c. 1/2x + 5 > 15
d. 2/3p+4≤8
e. 2y-7/2 < 3

Answer 1

A.))  2+ 11/b = 7 1/2
11/b = 15/2 - 2
11/b = ( 15-4)/2
11 = 11/2 b 
22 = 11b
2 = b

b.))2x-6>8x+5
-6-5>8x-2x
-11>6x
-11/6>x

c.)) 1/2x + 5 > 15
1/2 x > 15 - 5
x > 10 . 2
x > 20

d.)) 2/3 p + 4<8
2/3 p < 8-4
p < 4.3 / 2
p < 2.3 
p < 6

e.))2y - 7/2 < 3
2y < 3 + 7/2
2y < (6+7)/2
y < 13/2.2
y < 13/4

Answer 2

B. 2x-6 ≥ 8x + 5
2x-8x ≥ 5+6
-6x ≥ 11
x ≥ 1,83
x ≥ 1,28
c. ½x +5 > 15
½x >15-5
½x > 10
x > 10 : ½
x > 20
sorry cuma bisa sampai sini