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If you need math help, do you need to do homework and you can not do it yourself? Ask a question to our professionals at site StudyDaddy you will be helped there and will explain!

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y + z = 1 => z=1-y. X= 2y+3z replace x and z in "X-2+2z=-7", we have: 2y+3z-2+2(1-y)= -7 2y+3(1-y)-2+2(1-y)= -7 2y+3-3y-2+2-2y= -7 -3y=-7-3+2-2 -3y=-10 y=10/3 then you can easily find out x and z javascript obfuscator online, json formatter and validator

we have y + z = 1 => z=1-y. We have X= 2y+3z replace y and x in X-2+2z=-7 2(1-z)+3z-2+2z=-7 <=> 3z=-7 <=> z=-7/3 y=1+7/3=10/3 x=-1/3 This is what I think :D Gmail sign in

Hi there! Here are a few additional videos that should be able to help you with your problem. https://www.noodle.com/learn/details/60653/solve-systems-of-equations-using-elimination-3-8ee8 helps with solving by elimination and this can help solve for X! https://www.noodle.com/learn/details/48005/sat-prep-class-solving-equations-for-x