a,10+2x=45:43
10+2x=42
10+2x=16
2x=16-10
2x=6
x=6:2
x=3
b,310-(20-x)=300
20-x =310-300
20-x =10
x=20-10
x=10
c,4x+1+40=65
4x+1+40=65
4x+1+1 =65
4x+1 =65-1
4x+1 =64
4x+1 =43
x =3-1
=> x =2
a) 10 + 2x = 45 : 43
10 + 2x = 42 = 16
2x = 16 - 10
2x = 6
x = 3
b) 310 - (20 - x) = 300
310 - 20 + x = 300
290 + x = 300
x = 300 - 290
x = 10
c) 4x + 1 + 40 = 65
4x + + 1 = 65
4x + 1 = 64 = 43
=> x + 1 = 3
=> x = 2
a,10 + 2x = 16
2x = 16 -10
2x = 6
x =6:2
x=3
b,20-x=310-300
20-x=10
x=20-10
x=10
c, 4\(^{x+1}\)=64
x=2
a) 10 + 2x = 45 : 43
10 + 2x = 42
10 + 2x = 16
2x = 16 - 10
2x = 6
x = 6 : 2
x = 3
b) 310 - (20 - x ) = 300
20 - x = 310 - 300
20 - x = 10
x = 20 - 10
x = 10
c) 4x+1 + 40 = 65
4x+1 + 1 = 65
4x+1 = 65 - 1 = 64
4x+1 = 43
x + 1 = 3
x = 3 - 1
x = 1
Nếu bạn nào thấy đúng , nhớ k cho mình nha !
a) 10+2x =45 : 43
10+2x=45-3
10+2x=42
10+2x=16
2x=16 - 10
2x=6
x=6:2
x=3
b)310 - (20 - x) = 300
20 - x = 310 - 300
20 - x = 10
x = 20 - 10
x = 10
c)4x+1 + 40 = 65
4x+1 + 1 = 65
4x+1 = 65 - 1
4x+1 = 64
x +1 = 64 : 4
x + 1 = 16
x = 16 - 1
x = 15