Question

Algm me ajuda pfvr
B)7×-49-2×=25+3×
C)3×-3=54
D)10-20=2+2×
E)4×-25=-4×+7
F)10y-21=-y+100
G)x-2=12
H)×-8=1

Answer 1

Resposta:

Letra B:

$7x - 49 - 2x = 25 + 3x$

$7x-2x-3x=25+49$

$2x = 74$

$x = \frac{74}{2}$

$x = 37$

LETRA C:

$3x - 3 = 54$

$3x = 54 + 3$

$3x = 57$

$x = \frac{57}{3}$

$x = 19$

LETRA D:

$10 - 20 = 2 + 2x$

$- 2x = 2 - 10 + 20$

$- 2x = 12$

$x = \frac{12}{ - 2}$

$x = - 6$

LETRA E:

$4x - 25 = - 4x + 7$

$4x + 4x = 7 + 25$

$8x = 32$

$x = \frac{32}{8}$

$x = 4$

LETRA F:

$10y-21=-y+100$

$10y + y = 100 + 21$

$11y = 121$

$y = \frac{121}{11}$

$y = 11$

LETRA G:

$x-2=12$

$x = 12 + 2$

$x = 14$

LETRA H:

$x-8=1$

$x = 1 + 8$

$x = 9$

Espero ter ajudado^^