Question

Tentukan himpunan penyelesaian persamaan2 berikut :
A. 3x+14=6x-4
B. 7-5x=35-x
C. 5x+4=3(x-2)
D. (x-8)+4=3(2x+7)-9

Tolong dibantu ya?

Answer 1

a. 3x+14 = 6x-4
3x-6x = -4-14
-3x = -18
x = -18/-3
x = 6
b. 7-5x = 35-x
-5x+x = 35-7
-4x = 28
x = 28/-4
x = -7
C. 5x+4=3(x-2)
5x+4 = 3x-6
5x-3x = -6-4
2x = -10
x = -10/2
x = -5

Answer 2

A. 3x+14 = 6x - 4
⇔3x-6x = -4 - 14
⇔-3x = -18
⇔x = -18/-3
⇔ x = 6

b.7-5x = 35-x
⇔-5x+x = 35 - 7
⇔-4x = 28
⇔x = 28/-4
⇔x = -6

c. 5x+4 = 3(x-2)
⇔5x+4 = 3x - 6
⇔5x-3x = -6 - 4
⇔2x = -10
⇔x = -10/2
⇔x = -5

c. (x-8)+4 = 3(2x+7)-9
⇔4x-32 = 6x+21 - 9
⇔4x-6x = 21-9+32
⇔-2x = 44
⇔x = 44/-2
⇔x = -22