Question

Me ajudem que se não minha mãe me come na porrada

Answer 1

Resposta:

instala o app photomath é só tirar foto da conta e ele da resposta

Answer 2

a) -3x-17=-21 -> -3x=-21-17 *(-1)-> 3x=21+17 -> 3x= 38 -> x=38/3 -> x=12,6

b)2x-8=-7x -> 2x+7x=8 -> 9x=8 -> x=8/9

c) 3x+2=2x-11 -> 3x-2x=-11-2 -> x= -13

d)2x=16-(x+9) -> 2x+x=16-9 -> 3x=7 -> x=7/3

e)7(x-1)=2(3x+1) -> 7x-7=6x+2 -> 7x-6x=2+7 -> x=9

f)2/3-x=5x+1 -> 2/3-1=5x+x -> mmc=3 -> 2-3=6x -> 6x=-1 -> x = -1/6

g)-2x+14=5x-12 ->-2x-5x=-12-14 (*-1) -> 7x=26 -> x=26/7

h)4x-5=-6x+15 -> 4x+6x=15+5 -> 10x=20 -> x=20/10-> x=2

i)5x-2x=6-3x -> 3x+3x-6 -> 6x=6 -> x=6/6-> x=1

j)-5m-7-2m-2=0 -> -5m - 2m= 7+2 -> -7m=9(*-1) -> m=-9/7