Question

Selesaikan pertanyaan berikut ! hanya yg dilingkari saja

Answer 1

1 a. 3x+10=4
3x = 4-10
3x = -6
x = -2

b. 29-x = 9+3x
x-3x = 9-29
-2x = -20
x = 10

c. 30 = -5(6n+6)
30 = -30n-30
30n = -30-30
30n = -60
n = -2

d. -13 = 5(1+4y) - 2y
-13 = 5+20y-2y
-20y+2y = 5+13
-18y = 18
y = -1

3. C. 2 (3x+5) - 3 (7x-3) = x-29
6x +10 - 21x + 9 = x-29
6x-21x-x = -10-9-29
-16x = -48
x = 3