Question

Me ajudem nesse equações por favor.

3x + 1 = 2x - 10

5x + 2-X = 6 + 2x-2

4(x + 1) = 12

5(3-X) - 4x = 18
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Answer 1

a)3×+1=2×-10

3×+1-1=2×-10-1

3×=2×-11

3×-2×=2×-11-2×

x=-11

b)5×+2-×=6+2×-2

5×-×=4×

4×+2=6+2×-2

6-2=4 =4×+2=2×+4

4×=2×+2

4×-2×=2×+2-2×=2×=2

2× = 2 =1

2 2

×=1

c)4(×+1)=12

4(×+1)=12

4 4

×+1=3

×+1-1=3-1

×=2

d)5(3-×)-4×=18

5.3-5×

15-5×-4 ×=18

-5×-4×=-9×

15-9×=18

15-9×-15=18-15=-9×=3

9× =3 =-1

9 9 3

×=-1

3