Question

resolva as seguintes equações do primeiro grau .

a) X - 9 = 11


b) 10x - 20=3x - 79

c)30y - 12= 10y + 8

d)50x=25x-100

Answer 1

a) x - 9 = 11

x = 11 + 9

x = 20

b) 10 x - 20 = 3x - 79

7x = - 59

x = -59/7

c) 30y - 12 = 10y + 8

20y = 20

y = 1

d) 50x = 25x - 100

25x = - 100

x = -100/25

x = - 4

Answer 2

a) X - 9 = 11
X=11+9
X=20

b) 10x - 20=3x - 79
10X-3X=20-79
7X=-59
X=-59÷7
X=-8,42

c)30y - 12= 10y + 8
30Y-10Y=12+8
20Y=20
Y=20÷20
Y=1

d)50x=25x-100
50X-25X=-100
25X=-100
X=-100÷25
X=-4

Espero ter ajudado, bons estudos!