Question

me resposta;
a) 2x+4=28
b) 3x-7=2x-1
c) 4x-4=x+11
d) 2+5x=2x+10
e) 9x-2=7x+4
f) 4x-2x-1=x+1

Answer 1

a)  2x + 4 = 28;  2x = 28 - 4;  2x = 24;  x = 24/2 ... x = 12

b) 3x - 7 = 2x - 1;  3x - 2x  = -1 + 7; x = 6

c) 4x - 4  = x + 11;  4x - x = 11 + 4; 3x = 15;  x = 15/3 ... x = 5

d) 2 + 5x = 2x + 10;  5x - 2x = 10 - 2; 3x = 8  ... x = 8/3

e) 9x - 2 = 7x + 4 ; 9x - 7x = 4 + 2 ;  2x = 6;  x = 6/2... x = 3

f) 4x - 2x - 1 = x + 1; 4x - 2x - x = 1 + 1;  x = 2