Question

7.21 под буквой б помогите срочно плиииизз

Answer 1

$\left \{ {{4x+3y=6} \atop {2x+3y=0\, |\cdot (-2)}} \right. \; \; \oplus \; \left \{ {{4x+3y=6} \atop {-3y=6}} \right. \; \; \left \{ {{4x=6-3y} \atop {y=-2}} \right. \; \; \left \{ {{4x=12} \atop {y=-2}} \right. \; \; \left \{ {{x=3} \atop {y=-2}} \right. \\\\Otvet:\; \; (3,-2)\; .$