Question

Jawab yg benar ya....

1. tentukan nilai x
a. 3x + 4 = 7
b. 6x - 5 = 2x + 11
c. 3(2x - 1) = 5(x - 1)
d. 3x + 4(x - 2) = 3(x - 4) + 2

2. tentukan hasil berikut.
a. 2x - (3x + 10) = 4x - 35
b. 36 = 9 + 3(4t + 1)
c.15y - 2(4y - 1) = 2(3y - 1)

Jawab cepat ya... :)
buat dikumpul besok... :)
Terima kasih bgi yg mau jawab... :D

Answer 1

1. a. 3x+4 = 7
3x = 7-4
3x = 3
x = 3:3
x = 1

b. 6x-5 = 2x+11
6x-2x = 11+5
4x = 16
x = 16:4
x = 4

c. 3(2x-1) = 5(x-1)
6x-3 = 5x-5
6x-5x = -5+3
x = -2

d. 3x+4(x-2) = 3(x-4)+2
3x+4x-8 = 3x-12+2
7x-8 = 3x-10
7x-3x = -10+8
4x = -2
x = -2:4
x = -1/2

2. a. 2x-(3x+10) = 4x-35
2x-3x-10 = 4x-35
-x-10 = 4x-35
-10+35 = 4x+x
25 = 5x
x = 25:5
x = 5

b. 36 = 9+3(4t+1)
36-9 = 12t+3
27-3 = 12t
24 = 12t
t = 24:12
t = 2

c. 15y-2(4y-1) = 2(3y-1)
15y-8y+2 = 6y-2
7y+2 = 6y-2
7y-6y = -2-2
y = -4