Question

Równania
2[x+3]=10
5[x-3]=5
2[2x-3]=2
3[x-1]+2=8
4[3x+2]+3=35
4[x-2]-5=3
2[x-4]+2=4

Answer 1

A) 2[x+3]=10
2x+6=10
2x=10-6
2x=4 /:2
x=2
b) 5[x-3]=5
5x-15=5
5x=5+15
5x=20 /:5
x=4
c) 2[2x-3]=2
4x-6=2
4x=2+6
4x=8 /:4
x=2
d) 3[x-1]+2=8
3x-3+2=8
3x=8+3-2
3x=9 /:3
x=3
e) 4[3x+2]+3=35
12x+8+3=35
12x=35-8-3
12x=24 /:12
x=2
f) 4[x-2]-5=3
4x-8-5=3
4x=3+8+5
4x=16 /:4
x=4
g) 2[x-4]+2=4
2x-8+2=4
2x=4+8-2
2x=10 /:2
x=5

Answer 2

1. 2(x+3)=10 |-3 2x= 10-3=7 7:2 = 3.5
2. 5(x-3)=5 |+3. 5x=5+3=8
3. 2(2x-3)=2 |+3 4x=2+3=5
4. 3(x-1)+2=8 |-2 3x(x-1)=8-2=6. 4x=6