book Maths Puzzle Numerical Ability

1/2d+3/8=-2d

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book Other Question

slove this inequality
j
- - 8 < 4
4



They are asking me to describe a first step for solving each system using elimination. Then solve each system.

3x-y=21
2x+y=4


3x+4=-10
5x-2y=18


2x-y=6
-3x+4y=1


x-y=12
x+y=22