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Answer:
25.5 sq cm
Step-by-step explanation:
1*3/2+7*3+1/2*3*2=3/2+21+3=25.5 sq cm
Answer:
one solution : (-2 ; -7)
Step-by-step explanation:
hello :
x - y = 5
....(*)
- 3 x + y = - 1 ....(**)
by (*) : y=x-5
by(**) : y = 3x-1
3x-1 = x -5
3x-x=-5+1
2x= -4
x= -2
but : y = x-5 so : y= -2-5=-7
one solution : (-2 ; -7)