Question

rápido por favor tenho pouco tempo ​

Answer 1

$\Box \ \ \boxed{\begin{array}{l}\sf x+15=90 \end{array}}\\\Box \ \ \boxed{\begin{array}{l}\sf x=90-15 \end{array}}\\\Box \ \ \boxed{\begin{array}{l}\sf x=75 \end{array}}\\\\\\\Box \ \ \boxed{\begin{array}{l}\sf x+135=180 \end{array}}\\\Box \ \ \boxed{\begin{array}{l}\sf x=180-135 \end{array}}\\\Box \ \ \boxed{\begin{array}{l}\sf x=45 \end{array}}$

a = 75

b = 45