Question

1) Ache a raiz das equações?

A) 3×+4=25 B) 7×-10=30+3×

C) -24=64 D) -20+m=-5m+10

E) -9z-18=O F) 2k-2=12+k

Mim Ajudem pfv

Answer 1

a... 3x=25-4. 3x=21 x=21/3=7
b ...7x-10=30+3x. 7x-3x=30+10. 4x=40. x=40/4=10
c...-24=64. 64+24= 88
d....-20+m=-5m+10. 6m=10+20. m=30/6. m=5
e...-9z-18=0. -9z=0+18. -9z=18. z=-2
f...2k-2=12+k= k=14

Answer 2

Boa tarde

A) 3× + 4 = 25 , 3x =25 -4 =21, x = 21/3 = 7

B) 7× - 10 = 30 + 3× , 7x -3x = 30 + 10, 4x = 40,x= 10

C) -24=64 incompleta

D) -20 + m =-5m + 10, 5m + m =10 + 20, 6m = 30, m = 5

E) -9z - 18 = 0  , -9z =18, z =-18/9 = -2

F) 2k - 2 = 12 + k,   2k -k = 12 + 2 ,k = 14