Question

Решите уравнения
а)-50(-3x+10)=-200
б)-62(2y+22)=-1860
в)14(3y-5)=19y-1
г)11(8+9x)=88+x
д)100x+77=100-(x+23)
е)38-5y=34-4y

Answer 1

а)-50(-3x+10)=-200⇒150*x-500=-200⇒150*x=700⇒x=4 2/3
б)-62(2y+22)=-1860⇒-124*y-1364=-1860⇒124*y=496⇒y=4
в)14(3y-5)=19y-1⇒42*y-70=19*y-1⇒23*y=69⇒y=3
г)11(8+9x)=88+x⇒88+99*x=88+x⇒98*x=0⇒x=0
д)100x+77=100-(x+23)⇒100*x+77=77-x⇒101*x=0⇒x=0
е)38-5y=34-4y⇒4=y⇒y=4.

Answer 2

150x=-200+500=300, x=300/150=2

-124y=-1860+1364=-496, y=496/124=4

42y-19y=-1+70, 23y=69, y=69/23=3

99x-x=88-88, 98x=0, x=0

100x+x=100-23-77, 101x=0, x=0

-5y+4y=34-38, -y=-4, y=4