misssy808
21.06.2020 •
Mathematics
Help to resolve this equation system
30x+3y+9z= 66
35x+16y+13z= 94.5
200x+10y+300z= 910
Solved
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Ответ:
Let's solve for x.
30x+3y+9z=66
Step 1: Add -3y to both sides.
30x+3y+9z+−3y=66+−3y
30x+9z=−3y+66
Step 2: Add -9z to both sides.
30x+9z+−9z=−3y+66+−9z
30x=−3y−9z+66
Step 3: Divide both sides by 30.
30x/30=−3y−9z+66/30
x=−1/10y+−3/10z+11/5
Let's solve for x.
35x+16y+13z=94.5
Step 1: Add -16y to both sides.
35x+16y+13z+−16y=94.5+−16y
35x+13z=−16y+94.5
Step 2: Add -13z to both sides.
35x+13z+−13z=−16y+94.5+−13z
35x=−16y−13z+94.5
Step 3: Divide both sides by 35.
35x/35=−16y−13z+94.5/35
x=−16/35y+−13/35z+2.7
Let's solve for x.
200x+10y+300z=910
Step 1: Add -10y to both sides.
200x+10y+300z+−10y=910+−10y
200x+300z=−10y+910
Step 2: Add -300z to both sides.
200x+300z+−300z=−10y+910+−300z
200x=−10y−300z+910
Step 3: Divide both sides by 200.
200x/200=−10y−300z+910/200
x=−1/20y+−3/2z+91/20
Step-by-step explanation:
hopes this helps:-)
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