Question

Resolva as equações de primeiro graul a) 30-20+2×=10.

b) 3×-10+13=-2×+28.

c) 3×- ×10 = ×+1

2 8 4

Answer 1

A)30-20+2X=10
2X=10-30+20
2X=-20+20
2X=0
X=0

B)3X-10+13=-2X+28
3X+2X=+28+10-13
5X=38-13
5X=25
X=25/5
X=5

C)3X-10X=X+1
3X-10X-X=+1
3X-11X=+1
8X=+1
X=+1/8