Question

Resolva as equacoes
13×+1-10×=5+×...
2. (×+3)-5=×+5....
4. (×+1)=5+3. (2-×)...
3×+6=×+10.....

Answer 1

13×+1-10×=5+×
13x - 10x - x = 5 - 1
2x = 4
x = 4/2
x = 2
S = {2}

2.(×+3)-5=×+5.... 
2x + 6 - 5 = x+5
2x - x = 5-6+5
x = -1+5
x = 4
S= {4}

4. (×+1)=5+3. (2-×)
4x + 4 = 5 + 6 - 3x
4x + 3x = 5+6-4
7x = 7
x = 7/7
x = 1
S= {1}

3×+6=×+10
3x - x = 10 - 6
2x = 4
x = 4/2
x = 2
S {2}