Question

10 pontos
$20. \: calcule \: o \: valor \: de \: x$
3x + 40°
2X

$07.06 \: \: \: pra \: hoje$

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Answer 1

$\mathsf{2x+90^{\circ}+3x+40^{\circ}=180^{\circ}}\\\mathsf{5x+130^{\circ}=180^{\circ}}\\\mathsf{5x=180^{\circ}-130^{\circ}}\\\mathsf{5x=50^{\circ}}$

$\mathsf{x=\dfrac{50^{\circ}}{5}}\\\large\boxed{\boxed{\boxed{\boxed{\mathsf{x=10^{\circ}}}}}}$