Question

18- {2x [5x3+(8x4-2x9)-(19x3-37)]} ajudaaaaaaaa

Answer 1

Resposta:

$18-2\left[5\cdot \:3+\left(8\cdot \:4-2\cdot \:9\right)-\left(19\cdot \:3-37\right)\right]\\18-2\cdot \:9\\18-18\\0$

Explicação passo a passo:

$18-2\left[5\cdot \:3+\left(8\cdot \:4-2\cdot \:9\right)-\left(19\cdot \:3-37\right)\right]$

primeiro resolver o parenteses

$\left[5\cdot \:3+\left(8\cdot \:4-2\cdot \:9\right)-\left(19\cdot \:3-37\right)\right]\\5\cdot \:3+\left(8\cdot \:4-2\cdot \:9\right)-\left(19\cdot \:3-37\right)\\5\cdot \:3+14-\left(19\cdot \:3-37\right)\\5\cdot \:3+14-20\\15+14-20=9$

so isso ai so pega os que estao fora e termina a conta

$18-2\cdot \:9\\18-18\\0$