Question

Ecuaciones 5ײ-60=20 y 2ײ+15=113

Answer 1

Explicación paso a paso:

$5 {x}^{2} = 80 \\ {x}^{2} = 16 \\ x = 4$

$2 {x}^{2} = 98 \\ {x}^{2} = 49 \\ x = 7$